[METRICS SDK] Drop aggregation behaves as a no-op

[dbarker]

Fixes #4514

Changes

• Check if a view configures drop aggregation before creating storage
• Log a warning if the views will create duplicate conflicting metric storage objects.
• Update meter test to verify drop aggregation (including catch-all view cases) and general cleanup/enhancement.
• Updates sync instruments benchmark results

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

[codecov]

Codecov Report

❌ Patch coverage is 85.45455% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 83.44%. Comparing base (cadb1d6) to head (991aed7).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...dk/include/opentelemetry/sdk/metrics/instruments.h	62.50%	6 Missing ⚠️
...telemetry/sdk/metrics/state/multi_metric_storage.h	83.34%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4515      +/-   ##
==========================================
- Coverage   83.46%   83.44%   -0.02%     
==========================================
  Files         521      521              
  Lines       20380    20435      +55     
==========================================
+ Hits        17009    17049      +40     
- Misses       3371     3386      +15     

Files with missing lines	Coverage Δ
sdk/include/opentelemetry/sdk/metrics/meter.h	57.15% <ø> (ø)
sdk/src/metrics/meter.cc	82.92% <100.00%> (+1.57%)	⬆️
...telemetry/sdk/metrics/state/multi_metric_storage.h	88.68% <83.34%> (-1.56%)	⬇️
...dk/include/opentelemetry/sdk/metrics/instruments.h	73.18% <62.50%> (-2.58%)	⬇️

... and 3 files with indirect coverage changes

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