feat: rewrite vmaas repos endpoint in go

[Dugowitch]

This PR should wait until #90 gets merged

[jira-linking]

Referenced Jiras:
https://issues.redhat.com/browse/RHINENG-13556

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 79.28571% with 29 lines in your changes missing coverage. Please review.

Project coverage is 61.66%. Comparing base (86f6b90) to head (b17a2c6).
Report is 93 commits behind head on main.

Files with missing lines	Patch %	Lines
vmaas/repos.go	65.82%	23 Missing and 4 partials ⚠️
vmaas/vmaas.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #92      +/-   ##
==========================================
+ Coverage   56.74%   61.66%   +4.92%     
==========================================
  Files          11       17       +6     
  Lines        2062     2418     +356     
==========================================
+ Hits         1170     1491     +321     
- Misses        838      841       +3     
- Partials       54       86      +32     

Flag	Coverage Δ
unittests	61.66% <79.28%> (+4.92%)	⬆️

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