Enable hyper client for opentelemetry-otlp

[lalitb]

Fixes #1904

Changes

Enable hyper client for opentelemetry-otlp. And remove the custom hyper client from basic-otlp-http example.

Merge requirement checklist

• CONTRIBUTING guidelines followed
• Unit tests added/updated (if applicable)
• Appropriate CHANGELOG.md files updated for non-trivial, user-facing changes
• Changes in public API reviewed (if applicable)

[codecov]

Codecov Report

Attention: Patch coverage is 75.86207% with 7 lines in your changes missing coverage. Please review.

Project coverage is 79.4%. Comparing base (706a067) to head (bf25f22).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
opentelemetry-http/src/lib.rs	0.0%	7 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #2263   +/-   ##
=====================================
  Coverage   79.4%   79.4%           
=====================================
  Files        121     121           
  Lines      20968   20978   +10     
=====================================
+ Hits       16660   16673   +13     
+ Misses      4308    4305    -3     

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