Add a minor log to help debug when Meter is obtained from noops

[cijothomas]

Fixes #
Design discussion issue (if applicable) #

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 2 lines in your changes missing coverage. Please review.

Project coverage is 79.4%. Comparing base (967dc93) to head (cd1283f).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
opentelemetry/src/metrics/noop.rs	0.0%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #2435     +/-   ##
=======================================
- Coverage   79.4%   79.4%   -0.1%     
=======================================
  Files        122     122             
  Lines      21696   21697      +1     
=======================================
  Hits       17244   17244             
- Misses      4452    4453      +1     

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