fix flaky tests

[juliaElastic]

Summary

Changes in #201443 with some tweaks

Closes #201210
Closes #200786
Closes #191804
Closes #199204

[elasticmachine]

Pinging @elastic/fleet (Team:Fleet)

[juliaElastic]

it seems the flakyness happened again

FAIL  x-pack/plugins/fleet/public/components/package_policy_delete_provider.test.tsx (12.375 s)
--
  | ● PackagePolicyDeleteProvider › Should show delete integrations action and cancel modal
  |  
  | thrown: "Exceeded timeout of 5000 ms for a test.
  | Add a timeout value to this test to increase the timeout, if this is a long-running test. See https://jestjs.io/docs/api#testname-fn-timeout."
  |  
  | 136 \|
  | 137 \| describe('PackagePolicyDeleteProvider', () => {
  | > 138 \|   it('Should show delete integrations action and cancel modal', async () => {
  | \|   ^
  | 139 \|     useMultipleAgentPoliciesMock.mockReturnValue({ canUseMultipleAgentPolicies: false });
  | 140 \|     sendGetAgentsMock.mockResolvedValue({
  | 141 \|       data: {
  |  
  | at it (x-pack/plugins/fleet/public/components/package_policy_delete_provider.test.tsx:138:3)
  | at Object.describe (x-pack/plugins/fleet/public/components/package_policy_delete_provider.test.tsx:137:1)

[kibanamachine]

Starting backport for target branches: 8.x

https://github.com/elastic/kibana/actions/runs/12119147540

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: 7363af9

Metrics [docs]

✅ unchanged

History

• 💔 Build #255807 failed d72ab7e
• 💚 Build #255640 succeeded 4006bba
• 💚 Build #255588 succeeded 4006bba

[kibanamachine]

💔 All backports failed

Status	Branch	Result
❌	8.x	Backport failed because of merge conflicts

Manual backport

To create the backport manually run:

node scripts/backport --pr 202289

Questions ?

Please refer to the Backport tool documentation

[TinaHeiligers]

@juliaElastic the MultipleAgentPolicySummaryLine test failed again. Can you suggest a fix for it in #202748 please?