Adding custom params to AggInfo so that series builders can use it.

[raghavyadav01]

• Adding custom params to AggInfo so that series builders can use it.
• Unit test to validate the changes.
• I have verified the changes work manually as well with quickstart.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 63.84%. Comparing base (59551e4) to head (79d4f2c).
Report is 1142 commits behind head on master.

Files with missing lines	Patch %	Lines
...c/main/java/org/apache/pinot/tsdb/spi/AggInfo.java	75.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #14173      +/-   ##
============================================
+ Coverage     61.75%   63.84%   +2.09%     
- Complexity      207     1531    +1324     
============================================
  Files          2436     2621     +185     
  Lines        133233   144051   +10818     
  Branches      20636    22030    +1394     
============================================
+ Hits          82274    91965    +9691     
- Misses        44911    45315     +404     
- Partials       6048     6771     +723     

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	63.81% <75.00%> (+2.10%)	⬆️
java-21	63.71% <75.00%> (+2.08%)	⬆️
skip-bytebuffers-false	63.82% <75.00%> (+2.07%)	⬆️
skip-bytebuffers-true	63.69% <75.00%> (+35.96%)	⬆️
temurin	63.84% <75.00%> (+2.09%)	⬆️
unittests	63.83% <75.00%> (+2.09%)	⬆️
unittests1	55.53% <25.00%> (+8.64%)	⬆️
unittests2	34.34% <75.00%> (+6.61%)	⬆️

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.