Enhance data schema generation for empty response

[Jackie-Jiang]

This is a followup on #14836 with the following enhancements:

• Handle MV column type properly
• Handle the case when different number of columns are returned in single-stage vs multi-stage engine
• More exception handling to prevent it from throwing exception

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 39 lines in your changes missing coverage. Please review.

Project coverage is 63.74%. Comparing base (59551e4) to head (2c3dea9).
Report is 1625 commits behind head on master.

Files with missing lines	Patch %	Lines
...g/apache/pinot/query/parser/utils/ParserUtils.java	0.00%	37 Missing ⚠️
...sthandler/BaseSingleStageBrokerRequestHandler.java	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #14918      +/-   ##
============================================
+ Coverage     61.75%   63.74%   +1.99%     
- Complexity      207     1471    +1264     
============================================
  Files          2436     2708     +272     
  Lines        133233   151535   +18302     
  Branches      20636    23398    +2762     
============================================
+ Hits          82274    96600   +14326     
- Misses        44911    47689    +2778     
- Partials       6048     7246    +1198     

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	63.70% <0.00%> (+1.99%)	⬆️
java-21	63.63% <0.00%> (+2.00%)	⬆️
skip-bytebuffers-false	63.71% <0.00%> (+1.97%)	⬆️
skip-bytebuffers-true	63.60% <0.00%> (+35.88%)	⬆️
temurin	63.74% <0.00%> (+1.99%)	⬆️
unittests	63.74% <0.00%> (+1.99%)	⬆️
unittests1	56.33% <0.00%> (+9.44%)	⬆️
unittests2	34.01% <0.00%> (+6.28%)	⬆️

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