feat: add diag plugin to collect OS ca trust store info

[reubenmiller]

Proposed changes

Add diagnostic plugin script to collection information about the OS's CA trust store to help diagnose connectivity issues due to missing or invalid ca certificates.

The diagnostic plugin includes:

• list file/symlinks in the /etc/ssl/certs/ directory
• copy the ca-certificates.crt file

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Improvement (general improvements like code refactoring that doesn't explicitly fix a bug or add any new functionality)
• Documentation Update (if none of the other choices apply)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Paste Link to the issue

Checklist

• I have read the CONTRIBUTING doc
• I have signed the CLA (in all commits with git commit -s. You can activate automatic signing by running just prepare-dev once)
• I ran just format as mentioned in CODING_GUIDELINES
• I used just check as mentioned in CODING_GUIDELINES
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Further comments

[codecov]

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[github-actions]

Robot Results

✅ Passed	❌ Failed	⏭️ Skipped	Total	Pass %	⏱️ Duration
824	0	3	824	100	2h16m48.079236999s