[Security Solution] unskip create_runtime_field Cypress tests (#245325)

## Summary

This PR unskips the create_runtime_fields Cypress tests. Running the
test locally and everything is working!

<img width="637" height="183" alt="Screenshot 2025-12-04 at 5 16 06 PM"
src="https://github.com/user-attachments/assets/b6c1c244-764b-42d7-813e-ae6200049961"
/>

Flaky test runner:
https://buildkite.com/elastic/kibana-flaky-test-suite-runner/builds/10001

### 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.

#236607

Author: PhilippeOberti

x-pack/solutions/security/test/security_solution_cypress/cypress/e2e/investigations/data_view/create_runtime_field.cy.ts

@@ -13,7 +13,7 @@ import {
   populateTimeline,
 } from '../../../tasks/timeline';
 
-import { hostsUrl, ALERTS_URL } from '../../../urls/navigation';
+import { ALERTS_URL, hostsUrl } from '../../../urls/navigation';
 
 import { createRule } from '../../../tasks/api_calls/rules';
 
@@ -29,8 +29,7 @@ import { SAVE_FIELD_BUTTON } from '../../../screens/create_runtime_field';
 const alertRunTimeField = 'field.name.alert.page';
 const timelineRuntimeField = 'field.name.timeline';
 
-// Failing: See https://github.com/elastic/kibana/issues/236607
-describe.skip('Create DataView runtime field', { tags: ['@ess', '@serverless'] }, () => {
+describe('Create DataView runtime field', { tags: ['@ess', '@serverless'] }, () => {
   beforeEach(() => {
     login();
     deleteRuntimeField('security-solution-default', alertRunTimeField);