Adding bytes/string data type integration tests

[xiangfu0]

For string bytes conversion

[codecov-commenter]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (2b69d6a) 61.74% compared to head (e31ddc7) 61.74%.
Report is 3 commits behind head on master.

Files	Patch %	Lines
.../pinot/common/function/scalar/StringFunctions.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #12387      +/-   ##
============================================
- Coverage     61.74%   61.74%   -0.01%     
  Complexity      207      207              
============================================
  Files          2425     2428       +3     
  Lines        132766   132827      +61     
  Branches      20535    20545      +10     
============================================
+ Hits          81980    82012      +32     
- Misses        44771    44799      +28     
- Partials       6015     6016       +1     

Flag	Coverage Δ
custom-integration1	<0.01% <0.00%> (ø)
integration	<0.01% <0.00%> (ø)
integration1	<0.01% <0.00%> (ø)
integration2	0.00% <0.00%> (ø)
java-11	61.69% <0.00%> (+0.01%)	⬆️
java-21	61.60% <0.00%> (-0.03%)	⬇️
skip-bytebuffers-false	61.71% <0.00%> (-0.02%)	⬇️
skip-bytebuffers-true	61.58% <0.00%> (-0.01%)	⬇️
temurin	61.74% <0.00%> (-0.01%)	⬇️
unittests	61.73% <0.00%> (-0.01%)	⬇️
unittests1	46.90% <0.00%> (+<0.01%)	⬆️
unittests2	27.73% <0.00%> (-0.02%)	⬇️

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[KKcorps]

LGTM!