[Traces] Support named options in HttpWebRequest instrumentation

[CodeBlanch]

Changes

• Applies the named options pattern from [Metrics] Clean up repo exporters to use new DI patterns #3648 to HttpWebRequest tracer builder extension.

TODOs

• Appropriate CHANGELOG.md updated for non-trivial changes
• Unit tests
• Changes in public API reviewed

[codecov]

Codecov Report

Merging #3667 (7e57945) into main (215f58b) will increase coverage by 0.00%.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3667   +/-   ##
=======================================
  Coverage   87.72%   87.73%           
=======================================
  Files         283      283           
  Lines       10286    10286           
=======================================
+ Hits         9023     9024    +1     
+ Misses       1263     1262    -1     

Impacted Files	Coverage Δ
...umentation.Http/TracerProviderBuilderExtensions.cs	100.00% <ø> (ø)
...Telemetry/Internal/SelfDiagnosticsEventListener.cs	96.87% <0.00%> (-0.79%)	⬇️
...emetry.Api/Internal/OpenTelemetryApiEventSource.cs	79.41% <0.00%> (+5.88%)	⬆️