Use verbose logging on Unix (#47813)
Use verbose logging on Unix (#47813)

The verbose logging option causes xUnit to output starting / finished
markers for each of the tests that it is executing. This will help us
track down the test that is hanging on Mac so frequently
tannergooding/roslyn,stephentoub/roslyn,gafter/roslyn,aelij/roslyn,dotnet/roslyn,AmadeusW/roslyn,diryboy/roslyn,heejaechang/roslyn,weltkante/roslyn,eriawan/roslyn,panopticoncentral/roslyn,panopticoncentral/roslyn,weltkante/roslyn,KevinRansom/roslyn,bartdesmet/roslyn,eriawan/roslyn,dotnet/roslyn,ErikSchierboom/roslyn,AlekseyTs/roslyn,mavasani/roslyn,diryboy/roslyn,panopticoncentral/roslyn,jasonmalinowski/roslyn,brettfo/roslyn,mgoertz-msft/roslyn,AmadeusW/roslyn,sharwell/roslyn,jasonmalinowski/roslyn,stephentoub/roslyn,sharwell/roslyn,aelij/roslyn,eriawan/roslyn,wvdd007/roslyn,weltkante/roslyn,shyamnamboodiripad/roslyn,dotnet/roslyn,bartdesmet/roslyn,mgoertz-msft/roslyn,tannergooding/roslyn,CyrusNajmabadi/roslyn,CyrusNajmabadi/roslyn,aelij/roslyn,physhi/roslyn,gafter/roslyn,ErikSchierboom/roslyn,mavasani/roslyn,KirillOsenkov/roslyn,tannergooding/roslyn,shyamnamboodiripad/roslyn,physhi/roslyn,brettfo/roslyn,KirillOsenkov/roslyn,gafter/roslyn,jasonmalinowski/roslyn,KevinRansom/roslyn,shyamnamboodiripad/roslyn,bartdesmet/roslyn,tmat/roslyn,wvdd007/roslyn,sharwell/roslyn,brettfo/roslyn,CyrusNajmabadi/roslyn,ErikSchierboom/roslyn,mavasani/roslyn,AmadeusW/roslyn,heejaechang/roslyn,KirillOsenkov/roslyn,physhi/roslyn,mgoertz-msft/roslyn,stephentoub/roslyn,AlekseyTs/roslyn,wvdd007/roslyn,KevinRansom/roslyn,diryboy/roslyn,AlekseyTs/roslyn,heejaechang/roslyn,tmat/roslyn,tmat/roslyn