Verify zip of protoc in generator.Dockerfile

[MrAlias]

SHA256 sums computed from the v32.0 release artifacts.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 61.63%. Comparing base (7330cbb) to head (b677ac7).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #660      +/-   ##
==========================================
+ Coverage   61.50%   61.63%   +0.13%     
==========================================
  Files         199      199              
  Lines       22128    22128              
==========================================
+ Hits        13609    13638      +29     
+ Misses       7548     7527      -21     
+ Partials      971      963       -8     

Flag	Coverage Δ
integration-test-arm	34.43% <ø> (-0.07%)	⬇️
k8s-integration-test-1961-	?
k8s-integration-test-1963-	50.09% <ø> (?)
oats-test	37.19% <ø> (-0.02%)	⬇️

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