[Security Solution] unskip event_rendered_view Cypress tests (#245312)

## Summary

A [recent PR](#245253) fixed an
issue with the alerts table that was not properly switching between grid
view and event rendered view.

This PR unskips the Cypress tests related to testing the event rendered
view in our alerts page alerts table.

<img width="639" height="273" alt="Screenshot 2025-12-04 at 4 42 06 PM"
src="https://github.com/user-attachments/assets/510a6de3-ccbc-4268-96fd-2ced9c6cb45d"
/>

Flaky test runner:
https://buildkite.com/elastic/kibana-flaky-test-suite-runner/builds/10002

### Checklist

- [ ] [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)
- [x] Review the [backport
guidelines](https://docs.google.com/document/d/1VyN5k91e5OVumlc0Gb9RPa3h1ewuPE705nRtioPiTvY/edit?usp=sharing)
and apply applicable `backport:*` labels.

#236608

Author: PhilippeOberti

x-pack/solutions/security/test/security_solution_cypress/cypress/e2e/investigations/alerts/event_rendered_view.cy.ts

@@ -35,8 +35,7 @@ import {
   XY_CHART,
 } from '../../../screens/shared';
 
-// Failing: See https://github.com/elastic/kibana/issues/236608
-describe.skip(`Event Rendered View`, { tags: ['@ess', '@serverless'] }, () => {
+describe(`Event Rendered View`, { tags: ['@ess', '@serverless'] }, () => {
   beforeEach(() => {
     login();
     createRule(getNewRule());