[sdk] Remove System.Reflection.Emit.Lightweight dependency

[CodeBlanch]

Changes

• Removes System.Reflection.Emit.Lightweight dependency from SDK (it is no longer needed).
• Adds System.Reflection.Emit.Lightweight dependency to OpenTelemetry.Exporter.OpenTelemetryProtocol where it is currently needed.

TODOs

• Appropriate CHANGELOG.md updated for non-trivial changes

[codecov]

Codecov Report

Merging #4140 (1da1961) into main (c0f927f) will decrease coverage by 0.06%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4140      +/-   ##
==========================================
- Coverage   85.54%   85.48%   -0.06%     
==========================================
  Files         293      293              
  Lines       11371    11371              
==========================================
- Hits         9727     9721       -6     
- Misses       1644     1650       +6     

Impacted Files	Coverage Δ
...tation/OpenTelemetryProtocolExporterEventSource.cs	85.00% <0.00%> (-15.00%)	⬇️
...porter.OpenTelemetryProtocol/OtlpMetricExporter.cs	72.72% <0.00%> (-13.64%)	⬇️
...lementation/SqlClientInstrumentationEventSource.cs	70.83% <0.00%> (-4.17%)	⬇️
...ter.ZPages/Implementation/ZPagesActivityTracker.cs	97.14% <0.00%> (-2.86%)	⬇️
...tpListener/Internal/PrometheusCollectionManager.cs	73.62% <0.00%> (-2.20%)	⬇️
...ZPages/Implementation/ZPagesExporterEventSource.cs	62.50% <0.00%> (+6.25%)	⬆️
...emetry.Api/Internal/OpenTelemetryApiEventSource.cs	82.35% <0.00%> (+8.82%)	⬆️

[Kielek]

Consider to put information about direct dependency i OTLP CHANGELOG (I know that it was transitively available).

[CodeBlanch]

For those curious, OTLP Exporter uses a couple dynamic methods to reset the count of RepeatedFields so they may be reused to avoid some allocations. Example here. A while back we were able to get a change put into Protobuf to make the default clear behavior capacity-preserving. I just checked, there is 3.22.0-rc1 which includes the change. So it seems we will be able to clean this up soon!