Split pinot-protobuf plugin to pinot-protobuf and pinot-confluent-protobuf

[xiangfu0]

#14835

Split the confluent related code from pinot-protobuf to pinot-confluent-protobuf .

So the users have concern about confluent license could remove the pinot-confluent-protobuf shaded jar from the plugin directory.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.76%. Comparing base (59551e4) to head (d1b4433).
Report is 1602 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #14858      +/-   ##
============================================
+ Coverage     61.75%   63.76%   +2.01%     
- Complexity      207     1464    +1257     
============================================
  Files          2436     2707     +271     
  Lines        133233   151261   +18028     
  Branches      20636    23352    +2716     
============================================
+ Hits          82274    96449   +14175     
- Misses        44911    47565    +2654     
- Partials       6048     7247    +1199     

Flag	Coverage Δ
custom-integration1	100.00% <ø> (+99.99%)	⬆️
integration	100.00% <ø> (+99.99%)	⬆️
integration1	100.00% <ø> (+99.99%)	⬆️
integration2	0.00% <ø> (ø)
java-11	63.73% <ø> (+2.02%)	⬆️
java-21	63.61% <ø> (+1.99%)	⬆️
skip-bytebuffers-false	63.75% <ø> (+2.00%)	⬆️
skip-bytebuffers-true	63.59% <ø> (+35.86%)	⬆️
temurin	63.76% <ø> (+2.01%)	⬆️
unittests	63.75% <ø> (+2.01%)	⬆️
unittests1	56.29% <ø> (+9.39%)	⬆️
unittests2	34.07% <ø> (+6.34%)	⬆️

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