[8.19] (backport #8374) fix: increase context timeout to accommodate for slower machines in Test_checkForUnprivilegedVault

[mergify]

What does this PR do?

This PR addresses increases the test context timeout from 5s to 20s of Test_checkForUnprivilegedVault to accommodate for slower machines, such as Mac CI runners, and to avoid intermittent failures due to timing out while trying to acquire a file lock.

Why is it important?

The test Test_checkForUnprivilegedVault/file_vault_exists_but_it's_unreadable_-_return_error was observed to fail intermittently on slower environments (e.g., Mac runners) due to context deadline exceeded errors when attempting to acquire a file lock. These failures were not related to the actual logic being tested, but rather to insufficient timeout settings. Increasing the timeout ensures test stability across environments. In addition, updating the deprecated logp.NewInMemory call eliminates static analysis warnings.

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

None. This change only affects a unit test and does not impact production behavior or configurations.

How to test this PR locally

mage unitTest

Related issues

• Closes [Flaky Test]: Test_checkForUnprivilegedVault – err: context deadline exceeded" does not contain "permission denied" #8373

  ---

  This is an automatic backport of pull request fix: increase context timeout to accommodate for slower machines in Test_checkForUnprivilegedVault #8374 done by Mergify.

[elasticmachine]

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

[mergify]

This pull request has not been merged yet. Could you please review and merge it @pkoutsovasilis? 🙏

[elastic-sonarqube]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
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0.0% Duplication on New Code

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[elasticmachine]

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cc @pkoutsovasilis