chore: Update metric sdk to stable status

[cijothomas]

Time to make Metric SDK Stable!
No major perf issues, no major bugs.
Views are brought out of experimental status.
Cardinality capping applied by default (and configurable via Views)
Trimmed down questionable public APIs or hid behind opt-in experimental feature flags.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.1%. Comparing base (bf22aeb) to head (573dc85).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #2996     +/-   ##
=======================================
- Coverage   81.1%   81.1%   -0.1%     
=======================================
  Files        126     126             
  Lines      24794   24794             
=======================================
- Hits       20131   20130      -1     
- Misses      4663    4664      +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.

[cijothomas]

Have a small set of public API changes are coming, moving to draft until then.