Non-private readonly fields are PascalCase
Non-private readonly fields are PascalCase

Fixes #33608

gafter/roslyn,shyamnamboodiripad/roslyn,mavasani/roslyn,weltkante/roslyn,VSadov/roslyn,MichalStrehovsky/roslyn,CyrusNajmabadi/roslyn,wvdd007/roslyn,nguerrera/roslyn,davkean/roslyn,abock/roslyn,agocke/roslyn,sharwell/roslyn,mgoertz-msft/roslyn,wvdd007/roslyn,dotnet/roslyn,AmadeusW/roslyn,genlu/roslyn,jmarolf/roslyn,dotnet/roslyn,abock/roslyn,panopticoncentral/roslyn,sharwell/roslyn,MichalStrehovsky/roslyn,sharwell/roslyn,aelij/roslyn,diryboy/roslyn,tannergooding/roslyn,jasonmalinowski/roslyn,heejaechang/roslyn,heejaechang/roslyn,eriawan/roslyn,CyrusNajmabadi/roslyn,tannergooding/roslyn,jasonmalinowski/roslyn,tmat/roslyn,tmat/roslyn,ErikSchierboom/roslyn,weltkante/roslyn,MichalStrehovsky/roslyn,bartdesmet/roslyn,reaction1989/roslyn,davkean/roslyn,genlu/roslyn,physhi/roslyn,jmarolf/roslyn,aelij/roslyn,stephentoub/roslyn,mavasani/roslyn,KevinRansom/roslyn,mavasani/roslyn,wvdd007/roslyn,KirillOsenkov/roslyn,VSadov/roslyn,dotnet/roslyn,tannergooding/roslyn,KirillOsenkov/roslyn,nguerrera/roslyn,AmadeusW/roslyn,eriawan/roslyn,aelij/roslyn,AlekseyTs/roslyn,brettfo/roslyn,KevinRansom/roslyn,shyamnamboodiripad/roslyn,swaroop-sridhar/roslyn,abock/roslyn,gafter/roslyn,reaction1989/roslyn,eriawan/roslyn,gafter/roslyn,physhi/roslyn,CyrusNajmabadi/roslyn,genlu/roslyn,brettfo/roslyn,KevinRansom/roslyn,bartdesmet/roslyn,tmat/roslyn,agocke/roslyn,AlekseyTs/roslyn,swaroop-sridhar/roslyn,mgoertz-msft/roslyn,AmadeusW/roslyn,diryboy/roslyn,diryboy/roslyn,davkean/roslyn,mgoertz-msft/roslyn,ErikSchierboom/roslyn,physhi/roslyn,shyamnamboodiripad/roslyn,brettfo/roslyn,jmarolf/roslyn,nguerrera/roslyn,VSadov/roslyn,KirillOsenkov/roslyn,jasonmalinowski/roslyn,swaroop-sridhar/roslyn,stephentoub/roslyn,agocke/roslyn,reaction1989/roslyn,panopticoncentral/roslyn,bartdesmet/roslyn,AlekseyTs/roslyn,ErikSchierboom/roslyn,stephentoub/roslyn,weltkante/roslyn,heejaechang/roslyn,panopticoncentral/roslyn