ENG-58885 add ServiceOption support to metrics

[prodion23]

Need to allow Headers to be specified for metrics export as well.

[codecov]

Codecov Report

Attention: Patch coverage is 77.77778% with 8 lines in your changes missing coverage. Please review.

Project coverage is 61.14%. Comparing base (17a76e2) to head (cdba686).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
instrumentation/opentelemetry/init.go	77.77%	6 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #247      +/-   ##
==========================================
- Coverage   61.18%   61.14%   -0.05%     
==========================================
  Files          59       59              
  Lines        2690     2697       +7     
==========================================
+ Hits         1646     1649       +3     
- Misses        964      967       +3     
- Partials       80       81       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.