Increase timeout for assertions in TestSetLogLevelFleetManaged

[pchila]

What does this PR do?

Fleet checkins may take up to 5 minutes so we need to increase timeouts for assertions in TestSetLogLevelFleetManaged to account for it as the agent may apply log level settings while there's already a Fleet check-in in progress.
Settings timeouts for retrieving the correct log level in Fleet to 6 minutes should give enough time to agent to set the log level and communicate it to Fleet in a new check-in request.

Why is it important?

This PR should remove flakiness coming from elastic-agent check-in timing in TestSetLogLevelFleetManaged.

Checklist

• I have read and understood the pull request guidelines of this project.
• My code follows the style guidelines of this project
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [ ] I have made corresponding change to the default configuration files
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have added an entry in ./changelog/fragments using the changelog tool
• [ ] I have added an integration test or an E2E test

Disruptive User Impact

How to test this PR locally

Related issues

• Closes [Flaky Test]: TestSetLogLevelFleetManaged – agent never communicated agent-specific log level "debug" to Fleet #5193

Questions to ask yourself

• How are we going to support this in production?
• How are we going to measure its adoption?
• How are we going to debug this?
• What are the metrics I should take care of?
• ...

[elasticmachine]

Pinging @elastic/elastic-agent-control-plane (Team:Elastic-Agent-Control-Plane)

[mergify]

This pull request does not have a backport label. Could you fix it @pchila? 🙏
To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-./d./d is the label that automatically backports to the 8./d branch. /d is the digit
• backport-active-all is the label that automatically backports to all active branches.
• backport-active-8 is the label that automatically backports to all active minor branches for the 8 major.
• backport-active-9 is the label that automatically backports to all active minor branches for the 9 major.

[elastic-sonarqube]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarQube

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: 2a6a00b

cc @pchila

[swiatekm]

I'm fine with this fix, but a better approach imo would be to set a shorter poll timeout for this test. From what I can see, Fleet-Server lets us set this per-request, we'd just need to allow it to be configured in agent.

[pchila]

I'm fine with this fix, but a better approach imo would be to set a shorter poll timeout for this test. From what I can see, Fleet-Server lets us set this per-request, we'd just need to allow it to be configured in agent.

In the CI build of this PR the execution time for this test is ~160s so it doesn't look too slow.
At this moment we cannot set the timeout as fleet-server is expecting agent holding on for around 5 minutes before timing out.
For more details have a look at #5193 (comment)