[8.11] [Fleet] enable flaky tests (#170305) (#170311)

# Backport

This will backport the following commits from `main` to `8.11`:
- [[Fleet] enable flaky tests
(#170305)](#170305)

<!--- Backport version: 8.9.7 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

<!--BACKPORT [{"author":{"name":"Julia
Bardi","email":"[email protected]"},"sourceCommit":{"committedDate":"2023-11-01T12:55:54Z","message":"[Fleet]
enable flaky tests (#170305)\n\nCloses
https://github.com/elastic/kibana/issues/167188\r\nCloses
https://github.com/elastic/kibana/issues/156941","sha":"10f7865e4559b43f49d3a73dfd469dee34631938","branchLabelMapping":{"^v8.12.0$":"main","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["release_note:skip","Team:Fleet","v8.12.0","v8.11.1"],"number":170305,"url":"https://github.com/elastic/kibana/pull/170305","mergeCommit":{"message":"[Fleet]
enable flaky tests (#170305)\n\nCloses
https://github.com/elastic/kibana/issues/167188\r\nCloses
https://github.com/elastic/kibana/issues/156941","sha":"10f7865e4559b43f49d3a73dfd469dee34631938"}},"sourceBranch":"main","suggestedTargetBranches":["8.11"],"targetPullRequestStates":[{"branch":"main","label":"v8.12.0","labelRegex":"^v8.12.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/170305","number":170305,"mergeCommit":{"message":"[Fleet]
enable flaky tests (#170305)\n\nCloses
https://github.com/elastic/kibana/issues/167188\r\nCloses
https://github.com/elastic/kibana/issues/156941","sha":"10f7865e4559b43f49d3a73dfd469dee34631938"}},{"branch":"8.11","label":"v8.11.1","labelRegex":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"state":"NOT_CREATED"}]}]
BACKPORT-->

Co-authored-by: Julia Bardi <[email protected]>

x-pack/test/fleet_api_integration/apis/epm/install_endpoint.ts

@@ -15,8 +15,7 @@ export default function (providerContext: FtrProviderContext) {
    * There are a few features that are only currently supported for the Endpoint
    * package due to security concerns.
    */
-  // Failing: See https://github.com/elastic/kibana/issues/156941
-  describe.skip('Install endpoint package', () => {
+  describe('Install endpoint package', () => {
     const { getService } = providerContext;
     skipIfNoDockerRegistry(providerContext);
     setupFleetAndAgents(providerContext);

x-pack/test/fleet_api_integration/apis/epm/list.ts

@@ -21,8 +21,7 @@ export default function (providerContext: FtrProviderContext) {
   // because `this` has to point to the Mocha context
   // see https://mochajs.org/#arrow-functions
 
-  // Failing: See https://github.com/elastic/kibana/issues/167188
-  describe.skip('EPM - list', async function () {
+  describe('EPM - list', async function () {
     skipIfNoDockerRegistry(providerContext);
 
     before(async () => {