Metric export to use common OTelSdkResult

[cijothomas]

Replaces #2600 as we have Common OTelSdkResult for export()

[codecov]

Codecov Report

Attention: Patch coverage is 24.00000% with 38 lines in your changes missing coverage. Please review.

Project coverage is 79.2%. Comparing base (f5b44a5) to head (c7c7791).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
opentelemetry-otlp/src/exporter/tonic/metrics.rs	0.0%	22 Missing ⚠️
opentelemetry-otlp/src/exporter/http/metrics.rs	0.0%	8 Missing ⚠️
.../src/metrics/periodic_reader_with_async_runtime.rs	44.4%	5 Missing ⚠️
opentelemetry-stdout/src/metrics/exporter.rs	0.0%	2 Missing ⚠️
opentelemetry-otlp/src/metric.rs	0.0%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #2604     +/-   ##
=======================================
- Coverage   79.2%   79.2%   -0.1%     
=======================================
  Files        118     118             
  Lines      22504   22513      +9     
=======================================
+ Hits       17829   17831      +2     
- Misses      4675    4682      +7     

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