(CAT-1991) - Skip missing dirs invalid_dir method

[jordanbreen28]

Summary

Updates invalid_directories? method in Pwsh::Util to ignore non existent entries for the lib env. Also warn rather than raise when invalid directory is found, this is not a critical error and is overprotective (see internal jira).

Refactored invalid_directories? method, new code removes unnecessary lines and opts for the direct return value of filtered array using a conditional .any? that meets the new requirements of the method.

More unit testing added to cover the new functioanlity.

Additional Context

Add any additional context about the problem here.

• [ ] Root cause and the steps to reproduce. (If applicable)
• [ ] Thought process behind the implementation.

Related Issues (if any)

Mention any related issues or pull requests.

Checklist

• [x] 🟢 Spec tests.
• [ ] 🟢 Acceptance tests.
• [ ] Manually verified.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 92.08%. Comparing base (a6dd0f0) to head (729b60d). Report is 3 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #334 +/- ## ========================================== - Coverage 92.10% 92.08% -0.03% ========================================== Files 6 6 Lines 722 720 -2 ========================================== - Hits 665 663 -2 Misses 57 57 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.