Regenerate HotROD proto

[yurishkuro]

Which problem is this PR solving?

• HotROD Proto was not checked for being up to date in the standard CI check
• And it did not match the output of the generator

Description of the changes

• Include proto-hotrod in the main proto target so that it always runs and is checked for being up to date
• Change settings to exclude all *.pb.go files from linting and formatting
• Remove unnecessary wrapper script for checking license headers
• Remove unnecessary wrapper script for checking imports order
• Do not exclude doc.go from linting
  • Add empty tests to 3 packages that started to get tested now because of sole doc.go file

How was this change tested?

• CI

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (a798e25) 52.59% compared to head (0494bc7) 95.58%.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #5040       +/-   ##
===========================================
+ Coverage   52.59%   95.58%   +42.98%     
===========================================
  Files         145      319      +174     
  Lines        8599    18794    +10195     
===========================================
+ Hits         4523    17965    +13442     
+ Misses       3728      665     -3063     
+ Partials      348      164      -184     

Flag	Coverage Δ
cassandra-3.x	25.61% <ø> (ø)
cassandra-4.x	25.61% <ø> (ø)
elasticsearch-5.x	19.88% <ø> (ø)
elasticsearch-6.x	19.87% <ø> (-0.02%)	⬇️
elasticsearch-7.x	20.00% <ø> (-0.02%)	⬇️
elasticsearch-8.x	20.11% <ø> (ø)
grpc-badger	19.50% <ø> (ø)
kafka	14.10% <ø> (ø)
opensearch-1.x	20.02% <ø> (ø)
opensearch-2.x	20.02% <ø> (ø)
unittests	93.33% <ø> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[yurishkuro]

added