Removed deprecated StreamServerInterceptor function from otelgrpc

[sonalgaud12]

This PR addresses #7107

• Removed the deprecated StreamServerInterceptor function
• Removed the benchmark test
• Removed tests
• Added a changelog entry in the ### Removed section of the unreleased changelog for the removal this as checkbox for md

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.5%. Comparing base (2f0a9c7) to head (3aa22bd).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #7362     +/-   ##
=======================================
- Coverage   81.6%   81.5%   -0.1%     
=======================================
  Files        205     205             
  Lines      18187   18107     -80     
=======================================
- Hits       14841   14760     -81     
- Misses      2924    2925      +1     
  Partials     422     422             

Files with missing lines	Coverage Δ
...ion/google.golang.org/grpc/otelgrpc/interceptor.go	79.4% <100.0%> (-7.8%)	⬇️

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