Refactor asp.net core test apps

[vishweshbankwar]

1. Move to minimal hosting model
2. Combine multiple apps into one by targeting multiple tfms in single app.

[codecov[bot]]

Codecov Report

Merging #3558 (68fc23b) into main (361912e) will increase coverage by 0.00%. The diff coverage is n/a.

:exclamation: Current head 68fc23b differs from pull request most recent head 74ca2bd. Consider uploading reports for the commit 74ca2bd to get more accurate results

@@           Coverage Diff           @@
##             main    #3558   +/-   ##
=======================================
  Coverage   87.34%   87.35%           
=======================================
  Files         278      278           
  Lines       10083    10083           
=======================================
+ Hits         8807     8808    +1     
+ Misses       1276     1275    -1     

Impacted Files	Coverage Δ
src/OpenTelemetry/Logs/Pool/LogRecordSharedPool.cs	78.94% <0.00%> (-21.06%)	:arrow_down:
src/OpenTelemetry/ProviderExtensions.cs	81.81% <0.00%> (-9.10%)	:arrow_down:
...Telemetry/Metrics/PeriodicExportingMetricReader.cs	72.72% <0.00%> (-5.46%)	:arrow_down:
...emetry.Api/Internal/OpenTelemetryApiEventSource.cs	73.52% <0.00%> (-2.95%)	:arrow_down:
...tpListener/Internal/PrometheusCollectionManager.cs	78.04% <0.00%> (-2.44%)	:arrow_down:
src/OpenTelemetry/Logs/OpenTelemetryLogger.cs	86.66% <0.00%> (-2.23%)	:arrow_down:
...Telemetry/Internal/SelfDiagnosticsEventListener.cs	97.65% <0.00%> (+0.78%)	:arrow_up:
...ter.ZPages/Implementation/ZPagesActivityTracker.cs	100.00% <0.00%> (+2.85%)	:arrow_up:
...metryProtocol/Implementation/ActivityExtensions.cs	94.50% <0.00%> (+3.29%)	:arrow_up:
...ZPages/Implementation/ZPagesExporterEventSource.cs	62.50% <0.00%> (+6.25%)	:arrow_up:
... and 2 more