Add core tag prefix to OTLP logs project

[alanwest]

No description provided.

[codecov]

Codecov Report

Merging #3316 (c595e40) into main (f314948) will increase coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #3316      +/-   ##
==========================================
+ Coverage   85.37%   85.40%   +0.03%     
==========================================
  Files         269      269              
  Lines        9552     9552              
==========================================
+ Hits         8155     8158       +3     
+ Misses       1397     1394       -3     

Impacted Files	Coverage Δ
...ter.ZPages/Implementation/ZPagesActivityTracker.cs	97.14% <0.00%> (-2.86%)	⬇️
...heus/Implementation/PrometheusCollectionManager.cs	82.27% <0.00%> (+2.53%)	⬆️
...emetry.Api/Internal/OpenTelemetryApiEventSource.cs	79.41% <0.00%> (+2.94%)	⬆️
...ZPages/Implementation/ZPagesExporterEventSource.cs	62.50% <0.00%> (+6.25%)	⬆️