Add: Support agent update availability indicators

[ozgen]

What

Updates gsa to parse agent and updater update availability information in the UI.

Why

This ensures agent and updater update availability information is correctly propagated

References

GEA-1523

Checklist

• Tests

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Snapshot Warnings

⚠️: No snapshots were found for the head SHA f0705da.

Ensure that dependencies are being submitted on PR branches and consider enabling retry-on-snapshot-warnings. See the documentation for more information and troubleshooting advice.

Scanned Files

None

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.71%. Comparing base (97ff4a3) to head (f0705da).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5069   +/-   ##
=======================================
  Coverage   76.71%   76.71%           
=======================================
  Files        1155     1155           
  Lines       30125    30131    +6     
  Branches     9017     8985   -32     
=======================================
+ Hits        23109    23115    +6     
  Misses       6269     6269           
  Partials      747      747           

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