Migrate SessionsViewer test from Enzyme to RTL (elastic#222962)

## Summary

Replace Enzyme with React Testing Library in the only test that our team
owns and still relied on Enzyme.

### Motivation

On June 4th, it was officially announced that **Enzyme is deprecated in
Kibana**.

As @Dosant put it in the email:

> Move all tests to RTL before we adopt React 19 (realistically a year+
from now). Otherwise, we would need to run Enzyme tests on an older
version of React, making them even less reliable.


### How to verify we have no more Enzyme tests

After checking the `CODEOWNERS` file, these are the folders our team
owns:

<details><summary>Files</summary>

- x-pack/platform/packages/shared/kbn-cloud-security-posture/common
- x-pack/solutions/security/packages/distribution-bar
- x-pack/solutions/security/packages/kbn-cloud-security-posture/graph
- x-pack/solutions/security/packages/kbn-cloud-security-posture/public
- x-pack/solutions/security/plugins/cloud_security_posture
- x-pack/solutions/security/plugins/session_view
-
x-pack/test_serverless/functional/test_suites/security/index.mki_only.ts
-
x-pack/solutions/security/plugins/security_solution/public/asset_inventory
- x-pack/packages/kbn-cloud-security-posture
- x-pack/plugins/cloud_security_posture
- x-pack/plugins/kubernetes_security
-
x-pack/solutions/security/plugins/security_solution/public/common/components/sessions_viewer
-
x-pack/solutions/security/plugins/security_solution/public/cloud_security_posture
- x-pack/solutions/security/plugins/security_solution/public/kubernetes
-
x-pack/solutions/security/plugins/security_solution/server/lib/asset_inventory
-
x-pack/solutions/security/plugins/security_solution/public/flyout/entity_details/universal_right
-
x-pack/solutions/security/plugins/security_solution/public/flyout/csp_details
-
x-pack/platform/plugins/shared/fleet/public/components/cloud_security_posture
-
x-pack/platform/plugins/shared/fleet/public/applications/fleet/sections/agent_policy/create_package_policy_page/single_page_layout/components/cloud_security_posture
-
x-pack/platform/plugins/shared/fleet/public/applications/fleet/sections/agent_policy/create_package_policy_page/single_page_layout/hooks/setup_technology.*
-
x-pack/platform/plugins/shared/fleet/public/applications/integrations/sections/epm/screens/detail/components/cloud_posture_third_party_support_callout.*
- x-pack/test/functional/es_archives/kubernetes_security
- x-pack/test/kubernetes_security
- x-pack/test/functional/es_archives/session_view
- x-pack/test/session_view
- x-pack/test/api_integration/apis/cloud_security_posture/
- x-pack/test/cloud_security_posture_functional/
- x-pack/test/cloud_security_posture_api/
-
x-pack/test_serverless/functional/test_suites/security/config.cloud_security_posture.*
-
x-pack/test_serverless/functional/test_suites/security/ftr/cloud_security_posture/
-
x-pack/test_serverless/api_integration/test_suites/security/cloud_security_posture/
-
x-pack/test/security_solution_cypress/cypress/e2e/cloud_security_posture/misconfiguration_contextual_flyout.cy.ts
-
x-pack/test/security_solution_cypress/cypress/e2e/cloud_security_posture/vulnerabilities_contextual_flyout.cy.ts
- x-pack/test/security_solution_cypress/cypress/e2e/asset_inventory

</details> 

To verify we have no more tests relying on Enzyme, simply search in your
editor for the term "enzyme" and paste the following line in _files to
include_:

```
x-pack/platform/packages/shared/kbn-cloud-security-posture/common,x-pack/solutions/security/packages/distribution-bar,x-pack/solutions/security/packages/kbn-cloud-security-posture/graph,x-pack/solutions/security/packages/kbn-cloud-security-posture/public,x-pack/solutions/security/plugins/cloud_security_posture,x-pack/solutions/security/plugins/session_view,x-pack/test_serverless/functional/test_suites/security/index.mki_only.ts,x-pack/solutions/security/plugins/security_solution/public/asset_inventory,x-pack/packages/kbn-cloud-security-posture,x-pack/plugins/cloud_security_posture,x-pack/plugins/kubernetes_security,x-pack/solutions/security/plugins/security_solution/public/common/components/sessions_viewer,x-pack/solutions/security/plugins/security_solution/public/cloud_security_posture,x-pack/solutions/security/plugins/security_solution/public/kubernetes,x-pack/solutions/security/plugins/security_solution/server/lib/asset_inventory,x-pack/solutions/security/plugins/security_solution/public/flyout/entity_details/universal_right,x-pack/solutions/security/plugins/security_solution/public/flyout/csp_details,x-pack/platform/plugins/shared/fleet/public/components/cloud_security_posture,x-pack/platform/plugins/shared/fleet/public/applications/fleet/sections/agent_policy/create_package_policy_page/single_page_layout/components/cloud_security_posture,x-pack/platform/plugins/shared/fleet/public/applications/fleet/sections/agent_policy/create_package_policy_page/single_page_layout/hooks/setup_technology.*,x-pack/platform/plugins/shared/fleet/public/applications/integrations/sections/epm/screens/detail/components/cloud_posture_third_party_support_callout.*,x-pack/test/functional/es_archives/kubernetes_security,x-pack/test/kubernetes_security,x-pack/test/functional/es_archives/session_view,x-pack/test/session_view,x-pack/test/api_integration/apis/cloud_security_posture/,x-pack/test/cloud_security_posture_functional/,x-pack/test/cloud_security_posture_api/,x-pack/test_serverless/functional/test_suites/security/config.cloud_security_posture.*,x-pack/test_serverless/functional/test_suites/security/ftr/cloud_security_posture/,x-pack/test_serverless/api_integration/test_suites/security/cloud_security_posture/,x-pack/test/security_solution_cypress/cypress/e2e/cloud_security_posture/misconfiguration_contextual_flyout.cy.ts,x-pack/test/security_solution_cypress/cypress/e2e/cloud_security_posture/vulnerabilities_contextual_flyout.cy.ts,x-pack/test/security_solution_cypress/cypress/e2e/asset_inventory
```

So your editor should look like this:

<img width="775" alt="Screenshot 2025-06-06 at 12 41 21"
src="https://github.com/user-attachments/assets/231b93d7-c9c6-4bd6-a1bb-422f1f7161a2"
/>

### Checklist

- [ ] Any text added follows [EUI's writing
guidelines](https://elastic.github.io/eui/#/guidelines/writing), uses
sentence case text and includes [i18n
support](https://github.com/elastic/kibana/blob/main/src/platform/packages/shared/kbn-i18n/README.md)
- [ ]
[Documentation](https://www.elastic.co/guide/en/kibana/master/development-documentation.html)
was added for features that require explanation or tutorials
- [x] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios
- [ ] If a plugin configuration key changed, check if it needs to be
allowlisted in the cloud and added to the [docker
list](https://github.com/elastic/kibana/blob/main/src/dev/build/tasks/os_packages/docker_generator/resources/base/bin/kibana-docker)
- [x] This was checked for breaking HTTP API changes, and any breaking
changes have been approved by the breaking-change committee. The
`release_note:breaking` label should be applied in these situations.
- [ ] [Flaky Test
Runner](https://ci-stats.kibana.dev/trigger_flaky_test_runner/1) was
used on any tests changed
- [x] The PR description includes the appropriate Release Notes section,
and the correct `release_note:*` label is applied per the
[guidelines](https://www.elastic.co/guide/en/kibana/master/contributing.html#kibana-release-notes-process)

### Identify risks

No risks at all.

Co-authored-by: Paulo Silva <[email protected]>

Author: albertoblaz

x-pack/solutions/security/plugins/security_solution/public/common/components/sessions_viewer/index.test.tsx

@@ -13,7 +13,6 @@ import type { EntityType } from '@kbn/timelines-plugin/common';
 import type { SessionsComponentsProps } from './types';
 import { TableId } from '@kbn/securitysolution-data-table';
 import { licenseService } from '../../hooks/use_license';
-import { mount } from 'enzyme';
 import type { EventsViewerProps } from '../events_viewer';
 
 jest.mock('../../lib/kibana');
@@ -106,14 +105,14 @@ mockGetDefaultControlColumn.mockReturnValue([
 
 describe('SessionsView', () => {
   it('renders the session view', async () => {
-    const wrapper = mount(
+    const { getByTestId } = render(
       <TestProviders>
         <SessionsView {...testProps} />
       </TestProviders>
     );
 
     await waitFor(() => {
-      expect(wrapper.find(`[data-test-subj="${TEST_ID}"]`).exists()).toBeTruthy();
+      expect(getByTestId(TEST_ID)).toBeTruthy();
     });
   });