[Security Solution] Unskip previously flaky Cypress tests that intera…

…ct with combobox (elastic#183912)

**Resolves: elastic#183485

Unskips Related Integrations and Required Fields Cypress tests that were
made flaky by an update to `EuiComboBox` in EUI `v94.3.0`. This issue
was later fixed in EUI `v94.5.0`, so we are unskipping the tests.

🟢 Flaky test runner: [100 runs for ESS, 100 runs for
Serverless](https://buildkite.com/elastic/kibana-flaky-test-suite-runner/builds/6058)

x-pack/test/security_solution_cypress/cypress/e2e/detection_response/detection_engine/rule_creation/common_flows.cy.ts

@@ -33,8 +33,8 @@ import {
   fillMaxSignals,
   fillNote,
   fillReferenceUrls,
-  // fillRelatedIntegrations,
-  // fillRequiredFields,
+  fillRelatedIntegrations,
+  fillRequiredFields,
   fillRiskScore,
   fillRuleName,
   fillRuleTags,
@@ -69,14 +69,8 @@ describe('Common rule creation flows', { tags: ['@ess', '@serverless'] }, () =>
   it('Creates and enables a rule', function () {
     cy.log('Filling define section');
     importSavedQuery(this.timelineId);
-    /*
-      The following steps are flaky due to a recent EUI upgrade.
-
-      Underlying EUI issue: https://github.com/elastic/eui/issues/7761
-      Issue to uncomment these once the EUI fix is in place: https://github.com/elastic/kibana/issues/183485
-    */
-    // fillRequiredFields();
-    // fillRelatedIntegrations();
+    fillRequiredFields();
+    fillRelatedIntegrations();
     cy.get(DEFINE_CONTINUE_BUTTON).click();
 
     cy.log('Filling about section');