Add BrokerGrpcServer for a streaming response fetching endpoint

[xiangfu0]

• Add BrokerGrpcServer which is a grpc based broker query endpoint
• Add Grpc client support in pinot-java-client with only broker list as the constructor
• In integration tests, randomly pick grpc or http for sending queries

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 11.08247% with 345 lines in your changes missing coverage. Please review.

Project coverage is 63.28%. Comparing base (59551e4) to head (d2531f7).
Report is 1746 commits behind head on master.

Files with missing lines	Patch %	Lines
...org/apache/pinot/broker/grpc/BrokerGrpcServer.java	16.18%	140 Missing and 5 partials ⚠️
...a/org/apache/pinot/client/grpc/GrpcConnection.java	0.00%	94 Missing ⚠️
...he/pinot/broker/grpc/BrokerGrpcRequestBuilder.java	0.00%	38 Missing ⚠️
...pache/pinot/broker/grpc/GrpcRequesterIdentity.java	0.00%	32 Missing ⚠️
...pache/pinot/client/grpc/GrpcPreparedStatement.java	0.00%	27 Missing ⚠️
...ain/java/org/apache/pinot/spi/utils/JsonUtils.java	0.00%	6 Missing ⚠️
...ava/org/apache/pinot/client/ConnectionFactory.java	0.00%	1 Missing ⚠️
...g/apache/pinot/common/response/BrokerResponse.java	0.00%	1 Missing ⚠️
...va/org/apache/pinot/spi/utils/CommonConstants.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #15088      +/-   ##
============================================
+ Coverage     61.75%   63.28%   +1.53%     
- Complexity      207     1481    +1274     
============================================
  Files          2436     2751     +315     
  Lines        133233   154708   +21475     
  Branches      20636    23844    +3208     
============================================
+ Hits          82274    97903   +15629     
- Misses        44911    49409    +4498     
- Partials       6048     7396    +1348     

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	63.25% <11.08%> (+1.54%)	⬆️
java-21	63.16% <11.08%> (+1.54%)	⬆️
skip-bytebuffers-false	63.27% <11.08%> (+1.52%)	⬆️
skip-bytebuffers-true	63.14% <11.08%> (+35.42%)	⬆️
temurin	63.28% <11.08%> (+1.53%)	⬆️
unittests	63.27% <11.08%> (+1.53%)	⬆️
unittests1	56.03% <52.94%> (+9.14%)	⬆️
unittests2	33.89% <11.08%> (+6.16%)	⬆️

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