[Security Solution][Endpoint] Un-skip response console Cy tests (elas…

…tic#177726)

## Summary

- Deletes test file `cases_response_console.cy.ts` - duplicate test.
Coverage already exists under `responder.cy.ts`
    - Fixes elastic#172720 )
- unskips repsonder test
    - Fixes elastic#169894

x-pack/plugins/security_solution/public/management/cypress/e2e/response_actions/responder.cy.ts

@@ -36,12 +36,11 @@ describe('When accessing Endpoint Response Console', { tags: ['@ess', '@serverle
     closeResponder();
   };
 
-  before(() => {
+  beforeEach(() => {
     login();
   });
 
-  // FLAKY: https://github.com/elastic/kibana/issues/169894
-  describe.skip('from Cases', () => {
+  describe('from Cases', () => {
     let endpointData: ReturnTypeFromChainable<typeof indexEndpointHosts>;
     let caseData: ReturnTypeFromChainable<typeof indexNewCase>;
     let alertData: ReturnTypeFromChainable<typeof indexEndpointRuleAlerts>;
@@ -51,7 +50,7 @@ describe('When accessing Endpoint Response Console', { tags: ['@ess', '@serverle
 
     const openCaseAlertDetails = () => {
       cy.getByTestSubj(`comment-action-show-alert-${caseAlertActions.comments[alertId]}`).click();
-      cy.getByTestSubj('take-action-dropdown-btn').click();
+      return cy.getByTestSubj('take-action-dropdown-btn').click();
     };
 
     before(() => {
@@ -100,10 +99,6 @@ describe('When accessing Endpoint Response Console', { tags: ['@ess', '@serverle
       }
     });
 
-    beforeEach(() => {
-      login();
-    });
-
     it('should display responder option in take action menu', () => {
       loadPage(caseUrlPath);
       closeAllToasts();