PMM-12915 consistent proto validation rules

[ademidoff]

PMM-12915

Link to the Feature Build: SUBMODULES-0

NOTE: we can't go ahead with this PR because of the blocking PMM-13335.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 44.51%. Comparing base (5883e93) to head (d99e8cf).
Report is 2 commits behind head on v3.

Additional details and impacted files

@@           Coverage Diff           @@
##               v3    #3190   +/-   ##
=======================================
  Coverage   44.51%   44.51%           
=======================================
  Files         357      357           
  Lines       35594    35594           
=======================================
  Hits        15844    15844           
  Misses      18127    18127           
  Partials     1623     1623           

Flag	Coverage Δ
admin	11.52% <ø> (ø)
agent	52.66% <ø> (ø)
managed	46.65% <ø> (ø)
vmproxy	66.66% <ø> (ø)

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