chore(service): implement private pipeline quota check

[donch1989]

Because

• we need to check the private pipeline quota before creating or updating pipeline

This commit

• implement private pipeline quota check

[linear]

INS-2883 implement private pipeline quota check in pipeline-backend

[codecov]

Codecov Report

Attention: 74 lines in your changes are missing coverage. Please review.

Comparison is base (043ee04) 0.00% compared to head (92c98bc) 0.00%.

Files	Patch %	Lines
pkg/service/service.go	0.00%	74 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #323   +/-   ##
=====================================
  Coverage   0.00%   0.00%           
=====================================
  Files          7       7           
  Lines       2750    2813   +63     
=====================================
- Misses      2750    2813   +63     

Flag	Coverage Δ
unittests	0.00% <0.00%> (ø)

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