Global error handler cleanup - Metrics Pipeline

[lalitb]

Changes

Please provide a brief description of the changes here.

Merge requirement checklist

• CONTRIBUTING guidelines followed
• Unit tests added/updated (if applicable)
• Appropriate CHANGELOG.md files updated for non-trivial, user-facing changes
• Changes in public API reviewed (if applicable)

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.

Project coverage is 79.5%. Comparing base (4a405fd) to head (f99756a).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
opentelemetry-sdk/src/metrics/pipeline.rs	0.0%	5 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #2244   +/-   ##
=====================================
  Coverage   79.5%   79.5%           
=====================================
  Files        121     121           
  Lines      20938   20938           
=====================================
  Hits       16656   16656           
  Misses      4282    4282           

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[cijothomas]

not sure what is the action end users are expected to do when they see this.. If this is only for sdk maintainers to debug, then lets use debug level only. If keeping at Warn, then it should be actionable/descriptive.

[lalitb]

done