Update OTLP proto to v0.11.0

[alanwest]

Fixes #2604.

[codecov]

Codecov Report

Merging #2606 (d6bcccb) into main (3fbf1d9) will decrease coverage by 0.05%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #2606      +/-   ##
==========================================
- Coverage   80.30%   80.24%   -0.06%     
==========================================
  Files         256      256              
  Lines        8814     8814              
==========================================
- Hits         7078     7073       -5     
- Misses       1736     1741       +5     

Impacted Files	Coverage Δ
...nTelemetry/Internal/OpenTelemetrySdkEventSource.cs	70.47% <0.00%> (-3.81%)	⬇️
...emetry.Api/Internal/OpenTelemetryApiEventSource.cs	79.41% <0.00%> (-2.95%)	⬇️