Address comments for Segment Relocator Rebalance Config

[Jackie-Jiang]

Address remaining comments for #13863

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 75.00000% with 7 lines in your changes missing coverage. Please review.

Project coverage is 57.96%. Comparing base (59551e4) to head (7b9ba11).
Report is 1010 commits behind head on master.

Files with missing lines	Patch %	Lines
...roller/helix/core/relocation/SegmentRelocator.java	54.54%	5 Missing ⚠️
...va/org/apache/pinot/controller/ControllerConf.java	88.23%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #13963      +/-   ##
============================================
- Coverage     61.75%   57.96%   -3.79%     
+ Complexity      207      199       -8     
============================================
  Files          2436     2595     +159     
  Lines        133233   142947    +9714     
  Branches      20636    21962    +1326     
============================================
+ Hits          82274    82864     +590     
- Misses        44911    53600    +8689     
- Partials       6048     6483     +435     

Flag	Coverage Δ
custom-integration1	<0.01% <0.00%> (-0.01%)	⬇️
integration	<0.01% <0.00%> (-0.01%)	⬇️
integration1	<0.01% <0.00%> (-0.01%)	⬇️
integration2	0.00% <0.00%> (ø)
java-11	57.94% <75.00%> (-3.77%)	⬇️
java-21	57.82% <75.00%> (-3.80%)	⬇️
skip-bytebuffers-false	57.95% <75.00%> (-3.79%)	⬇️
skip-bytebuffers-true	57.79% <75.00%> (+30.06%)	⬆️
temurin	57.96% <75.00%> (-3.79%)	⬇️
unittests	57.96% <75.00%> (-3.79%)	⬇️
unittests1	40.77% <ø> (-6.12%)	⬇️
unittests2	27.95% <75.00%> (+0.22%)	⬆️

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