Fix license headers in pinot-kafka-3.0

[yashmayya]

• License header fixes and some other minor formatting corrections.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.

Project coverage is 64.16%. Comparing base (59551e4) to head (a49fcda).
Report is 1102 commits behind head on master.

Files with missing lines	Patch %	Lines
...in/stream/kafka30/KafkaStreamMetadataProvider.java	0.00%	3 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #14112      +/-   ##
============================================
+ Coverage     61.75%   64.16%   +2.41%     
- Complexity      207     1537    +1330     
============================================
  Files          2436     2596     +160     
  Lines        133233   143432   +10199     
  Branches      20636    21975    +1339     
============================================
+ Hits          82274    92032    +9758     
+ Misses        44911    44616     -295     
- Partials       6048     6784     +736     

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	64.01% <0.00%> (+2.30%)	⬆️
java-21	64.06% <0.00%> (+2.43%)	⬆️
skip-bytebuffers-false	64.03% <0.00%> (+2.28%)	⬆️
skip-bytebuffers-true	64.04% <0.00%> (+36.31%)	⬆️
temurin	64.16% <0.00%> (+2.41%)	⬆️
unittests	64.16% <0.00%> (+2.41%)	⬆️
unittests1	55.73% <ø> (+8.84%)	⬆️
unittests2	34.61% <0.00%> (+6.88%)	⬆️

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