[Security Solution] unskip alert_details_preview_panel_rule_preview Cypress test (elastic#230753)

## Summary

Test is passing locally. Unskipping and running Flaky test runner to
verify.

Flaky Test Runner:
https://buildkite.com/elastic/kibana-flaky-test-suite-runner/builds/9041
All tests passed!

elastic#229398

Author: PhilippeOberti

x-pack/test/security_solution_cypress/cypress/e2e/investigations/alerts/expandable_flyout/alert_details_preview_panel_rule_preview.cy.ts

@@ -7,17 +7,17 @@
 
 import { expandAlertAtIndexExpandableFlyout } from '../../../../tasks/expandable_flyout/common';
 import {
-  DOCUMENT_DETAILS_FLYOUT_RULE_PREVIEW_TITLE,
   DOCUMENT_DETAILS_FLYOUT_CREATED_BY,
-  DOCUMENT_DETAILS_FLYOUT_UPDATED_BY,
-  DOCUMENT_DETAILS_FLYOUT_RULE_PREVIEW_ABOUT_SECTION_HEADER,
   DOCUMENT_DETAILS_FLYOUT_RULE_PREVIEW_ABOUT_SECTION_CONTENT,
-  DOCUMENT_DETAILS_FLYOUT_RULE_PREVIEW_DEFINITION_SECTION_HEADER,
+  DOCUMENT_DETAILS_FLYOUT_RULE_PREVIEW_ABOUT_SECTION_HEADER,
   DOCUMENT_DETAILS_FLYOUT_RULE_PREVIEW_DEFINITION_SECTION_CONTENT,
-  DOCUMENT_DETAILS_FLYOUT_RULE_PREVIEW_SCHEDULE_SECTION_HEADER,
-  DOCUMENT_DETAILS_FLYOUT_RULE_PREVIEW_SCHEDULE_SECTION_CONTENT,
+  DOCUMENT_DETAILS_FLYOUT_RULE_PREVIEW_DEFINITION_SECTION_HEADER,
   DOCUMENT_DETAILS_FLYOUT_RULE_PREVIEW_FOOTER,
   DOCUMENT_DETAILS_FLYOUT_RULE_PREVIEW_FOOTER_LINK,
+  DOCUMENT_DETAILS_FLYOUT_RULE_PREVIEW_SCHEDULE_SECTION_CONTENT,
+  DOCUMENT_DETAILS_FLYOUT_RULE_PREVIEW_SCHEDULE_SECTION_HEADER,
+  DOCUMENT_DETAILS_FLYOUT_RULE_PREVIEW_TITLE,
+  DOCUMENT_DETAILS_FLYOUT_UPDATED_BY,
 } from '../../../../screens/expandable_flyout/alert_details_preview_panel_rule_preview';
 import {
   toggleRulePreviewAboutSection,
@@ -33,8 +33,7 @@ import { getNewRule } from '../../../../objects/rule';
 import { ALERTS_URL } from '../../../../urls/navigation';
 import { waitForAlertsToPopulate } from '../../../../tasks/create_new_rule';
 
-// FLAKY: https://github.com/elastic/kibana/issues/229398
-describe.skip(
+describe(
   'Alert details expandable flyout rule preview panel',
   { tags: ['@ess', '@serverless'] },
   () => {