T7292: add Python module client library for vyconfd

[jestabro]

Change summary

Add client request module for vyconfd.
This is needed for replacing the legacy my_cli_bin mediated components of configsession.py, among other uses.

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)

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

[jestabro]

Rebase over current.

[github-actions]

CI integration 👍 passed!

Details

CI logs

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

[Copilot]

Copilot reviewed 6 out of 7 changed files in this pull request and generated 1 comment.

Files not reviewed (1)

• libvyosconfig: Language not supported

[dmbaturin]

This is a pretty straightforward wrapping, I see no issues in it.