Unify endpoint API that related to OTel exporter

[XSAM]

Fix #1345

[codecov]

Codecov Report

Merging #1401 (a189f98) into master (045c3ff) will decrease coverage by 0.0%.
The diff coverage is 100.0%.

@@           Coverage Diff            @@
##           master   #1401     +/-   ##
========================================
- Coverage    78.6%   78.5%   -0.1%     
========================================
  Files         126     126             
  Lines        6369    6369             
========================================
- Hits         5011    5005      -6     
- Misses       1114    1120      +6     
  Partials      244     244             

Impacted Files	Coverage Δ
exporters/otlp/grpcconnection.go	85.9% <100.0%> (ø)
exporters/otlp/grpcdriver.go	90.1% <100.0%> (ø)
exporters/otlp/grpcoptions.go	87.5% <100.0%> (ø)
sdk/trace/batch_span_processor.go	74.5% <0.0%> (-5.9%)	⬇️