[EXPORTER] Fix PrometheusExporter to propagate new options to collector

[jaehyeong-cho]

Fixes #4052

Changes

Please provide a brief description of the changes here.

I read the comment at #4052 (comment), but understood that the topic of discussion there is more general in scope and has wider impact than this issue. Therefore, this PR aims to focus on fixing the bug described in the issue while maintaining public API backward compatibility (though ABI compatibility may be affected).

• Added member variables and constructor arguments to PrometheusCollector (with default values for backward compatibility)
• Updated PrometheusExporter to pass the new options when constructing PrometheusCollector

For significant contributions please make sure you have completed the following items:

• CHANGELOG.md updated for non-trivial changes
• Unit tests have been added
• Changes in public API reviewed

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: jaehyeong-cho / name: Jaehyeong Cho (85676db, affde54, ff8c097)
• ✅ login: marcalff / name: Marc Alff (8120f9e)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.06%. Comparing base (ec85d57) to head (4880ae7).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4055      +/-   ##
==========================================
- Coverage   82.07%   82.06%   -0.00%     
==========================================
  Files         385      385              
  Lines       15896    15900       +4     
==========================================
+ Hits        13045    13047       +2     
- Misses       2851     2853       +2     

Files with missing lines	Coverage Δ
exporters/prometheus/src/collector.cc	91.67% <100.00%> (+1.20%)	⬆️
exporters/prometheus/src/exporter.cc	54.55% <100.00%> (+2.17%)	⬆️

... and 1 file with indirect coverage changes

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[marcalff]

LGTM, thanks for the fix.

[marcalff]

I read the comment at #4052 (comment), but understood that the topic of discussion there is more general in scope and has wider impact than this issue. Therefore, this PR aims to focus on fixing the bug described in the issue while maintaining public API backward compatibility (though ABI compatibility may be affected).

Agreed.

[jaehyeong-cho]

Thank you for reviewing.