[EDR Workflows][8.12] Reenable artifact entries list FTR

[gergoabraham]

Summary

Locally the tests passed both for serverless and ESS, but on CI, serverless tests are disabled anyway on this branch, so I just enabled the tests for both envs.

• 10x https://buildkite.com/elastic/kibana-flaky-test-suite-runner/builds/4753 10/10 ✅
• 100x https://buildkite.com/elastic/kibana-flaky-test-suite-runner/builds/4759 100/100 ✅

A separate PR will try to enable it on main since there is an underlying issue there.

failing test issues:

• Failing test: X-Pack Endpoint Integrations Functional Tests on Serverless.x-pack/test/security_solution_endpoint/apps/integrations/artifact_entries_list·ts - endpoint For each artifact list under management "before all" hook in "For each artifact list under management" #173681
• Failing test: X-Pack Endpoint Integrations Functional Tests on Serverless.x-pack/test/security_solution_endpoint/apps/integrations/artifact_entries_list·ts - endpoint For each artifact list under management "after all" hook in "For each artifact list under management" #173682

[elasticmachine]

Pinging @elastic/security-defend-workflows (Team:Defend Workflows)

[kibana-ci]

💚 Build Succeeded

• Buildkite Build
• Commit: c99c33a

Metrics [docs]

✅ unchanged

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

cc @gergoabraham