Global error handler cleanup - ObservableUpDownCounter, ObservableGauge

[lalitb]

Changes

Changes similar to ObservableCounter as done in #2234

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 14.28571% with 24 lines in your changes missing coverage. Please review.

Project coverage is 79.4%. Comparing base (a18853e) to head (87d5bc3).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
opentelemetry-sdk/src/metrics/meter.rs	14.2%	24 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #2240     +/-   ##
=======================================
- Coverage   79.5%   79.4%   -0.1%     
=======================================
  Files        121     121             
  Lines      21116   21138     +22     
=======================================
  Hits       16803   16803             
- Misses      4313    4335     +22     

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