Fix segment size check in OfflineClusterIntegrationTest

[Jackie-Jiang]

Segment size is platform dependent because of the native library used by the chunk compressor.
Do not use the hard-coded segment size. Cache the segment size of the generated segments.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 62.00%. Comparing base (59551e4) to head (7fdf86d).
Report is 619 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #13389      +/-   ##
============================================
+ Coverage     61.75%   62.00%   +0.24%     
+ Complexity      207      198       -9     
============================================
  Files          2436     2550     +114     
  Lines        133233   140257    +7024     
  Branches      20636    21801    +1165     
============================================
+ Hits          82274    86960    +4686     
- Misses        44911    46701    +1790     
- Partials       6048     6596     +548     

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	61.97% <ø> (+0.26%)	⬆️
java-21	61.87% <ø> (+0.24%)	⬆️
skip-bytebuffers-false	61.99% <ø> (+0.24%)	⬆️
skip-bytebuffers-true	61.84% <ø> (+34.11%)	⬆️
temurin	62.00% <ø> (+0.24%)	⬆️
unittests	61.99% <ø> (+0.24%)	⬆️
unittests1	46.57% <ø> (-0.32%)	⬇️
unittests2	27.66% <ø> (-0.07%)	⬇️

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[klsince]

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