T6013: Add support for configuring TrustedUserCAKeys for ssh service

[takehaya]

Change Summary

This feature adds support for TrustedUserCAKeys, allowing SSH logins using signed CA certificates.
This PR does not include handling for AuthorizedPrincipalsFile. I plan to address it in a future PR.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, renaming)
• Refactoring (no functional changes)
• Migration from an old Vyatta component to vyos-1x, please link to related PR inside obsoleted component
• Other (please describe):

Related Task(s)

Related PR(s)

Component(s) name

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How to test

Smoketest result

Checklist:

• I have read the CONTRIBUTING document
• I have linked this PR to one or more Phabricator Task(s)
• I have run the components SMOKETESTS if applicable
• My commit headlines contain a valid Task id
• My change requires a change to the documentation
• I have updated the documentation accordingly

[github-actions]

👍
No issues in PR Title / Commit Title

[github-actions]

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[github-actions]

Conflicts have been resolved. A maintainer will review the pull request shortly.

[sarthurdev]

Thanks for addressing the other requested changes, this looks great!

[sarthurdev]

Looks good to me

[takehaya]

ummm...It seems like the failure is occurring in a part that doesn’t seem relevant to this case...:(

DEBUG - ======================================================================
DEBUG - FAIL: test_isis_07_segment_routing_configuration (__main__.TestProtocolsISIS.test_isis_07_segment_routing_configuration)
DEBUG - ----------------------------------------------------------------------
DEBUG - Traceback (most recent call last):
DEBUG -   File "/usr/libexec/vyos/tests/smoke/cli/test_protocols_isis.py", line 287, in test_isis_07_segment_routing_configuration
DEBUG -     self.assertIn(f' net {net}', tmp)
DEBUG - AssertionError: ' net 49.0001.1921.6800.1002.00' not found in ''

[takehaya]

@sarthurdev san @sever-sever san
I see. It looks like you've included something that already fails tests in the current branch.
There's no problem with this branch, so can you merge it?
https://github.com/vyos/vyos-1x/actions/runs/12434579110/job/34719164480#step:5:1913

[github-actions]

CI integration ❌ failed!

Details

CI logs

• CLI Smoketests (no interfaces) ❌ failed
• CLI Smoketests (interfaces only) ❌ failed
• Config tests 👍 passed
• RAID1 tests 👍 passed
• TPM tests 👍 passed