Move some mis-positioned tests under pinot-core

[Jackie-Jiang]

These tests are mis-positioned under pinot-core, which should be positioned under spi, common or segment-local

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 62.17%. Comparing base (59551e4) to head (38f6538).
Report is 272 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #12884      +/-   ##
============================================
+ Coverage     61.75%   62.17%   +0.42%     
+ Complexity      207      198       -9     
============================================
  Files          2436     2502      +66     
  Lines        133233   136415    +3182     
  Branches      20636    21106     +470     
============================================
+ Hits          82274    84813    +2539     
- Misses        44911    45322     +411     
- Partials       6048     6280     +232     

Flag	Coverage Δ
custom-integration1	<0.01% <ø> (-0.01%)	⬇️
integration	<0.01% <ø> (-0.01%)	⬇️
integration1	<0.01% <ø> (-0.01%)	⬇️
integration2	0.00% <ø> (ø)
java-11	62.11% <ø> (+0.40%)	⬆️
java-21	62.05% <ø> (+0.43%)	⬆️
skip-bytebuffers-false	62.15% <ø> (+0.40%)	⬆️
skip-bytebuffers-true	62.01% <ø> (+34.28%)	⬆️
temurin	62.17% <ø> (+0.42%)	⬆️
unittests	62.16% <ø> (+0.42%)	⬆️
unittests1	46.77% <ø> (-0.12%)	⬇️
unittests2	27.92% <ø> (+0.19%)	⬆️

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