[pinot-spark-connector] Bump spark connector max inbound message size

[cbalci]

Updating the GRPC client configuration used by the Pinot Spark Connector to use Int.MaxValue for message size which effectively bumps the max message size from 4MB to ~2GBs.
Spark-Connector is intended for potentially large reads, so 4MB can be a bottleneck for certain use cases (very wide tables).

Testing:
I've tested this locally with chunk sizes exceeding 4MB. I'm not adding an explicit test case not to unnecessarily burden the test runner.

bugfix performance

[codecov-commenter]

Codecov Report

Merging #9475 (89982f5) into master (d4392f9) will increase coverage by 43.95%.
The diff coverage is n/a.

@@              Coverage Diff              @@
##             master    #9475       +/-   ##
=============================================
+ Coverage     25.90%   69.85%   +43.95%     
- Complexity       44     4750     +4706     
=============================================
  Files          1890     1911       +21     
  Lines        101219   101895      +676     
  Branches      15383    15456       +73     
=============================================
+ Hits          26220    71181    +44961     
+ Misses        72344    25688    -46656     
- Partials       2655     5026     +2371     

Flag	Coverage Δ
integration1	25.97% <ø> (+0.07%)	⬆️
integration2	24.74% <ø> (?)
unittests1	67.10% <ø> (?)
unittests2	15.50% <ø> (?)

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

Impacted Files	Coverage Δ
...inion/event/DefaultMinionEventObserverFactory.java	50.00% <0.00%> (-16.67%)	⬇️
...r/helix/SegmentOnlineOfflineStateModelFactory.java	58.49% <0.00%> (-1.89%)	⬇️
.../pinot/minion/taskfactory/TaskFactoryRegistry.java	79.41% <0.00%> (-0.30%)	⬇️
...nandpush/SegmentGenerationAndPushTaskExecutor.java	66.90% <0.00%> (-0.24%)	⬇️
...roller/api/resources/PinotTaskRestletResource.java	2.98% <0.00%> (-0.02%)	⬇️
...pache/pinot/core/query/utils/idset/EmptyIdSet.java	25.00% <0.00%> (ø)
...inion/api/resources/PinotTaskProgressResource.java	0.00% <0.00%> (ø)
...anager/realtime/SegmentBuildTimeLeaseExtender.java	63.23% <0.00%> (ø)
...ing/instanceselector/BalancedInstanceSelector.java	84.61% <0.00%> (ø)
...ent/local/data/manager/TableDataManagerConfig.java	0.00% <0.00%> (ø)
... and 1400 more

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[Jackie-Jiang]

Thanks for the fix!