Refactor per worker histogram metrics

[Naireen]

Change how histogram metrics are handled as a part of addressing #34195.

Updating how counters are handled will be done in a subsequent PR to limit scope of each change.

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[Naireen]

R: @scwhittle

This is a follow up to #33503

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[scwhittle]

verify the per-worker field is set? To catch error of adding to builder after built

[Naireen]

Thanks for catching that, add it in the KafkaSinkMetricsTest.java file instead.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.31%. Comparing base (5d38b8e) to head (88c6d0e).
Report is 18 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #34244      +/-   ##
============================================
- Coverage     56.32%   56.31%   -0.01%     
+ Complexity     3286     3285       -1     
============================================
  Files          1172     1172              
  Lines        178933   178943      +10     
  Branches       3398     3398              
============================================
+ Hits         100778   100780       +2     
- Misses        74898    74903       +5     
- Partials       3257     3260       +3     

Flag	Coverage Δ
java	70.51% <100.00%> (-0.02%)	⬇️

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