Specify type inference rules for nullability annotations (#30670)
Specify type inference rules for nullability annotations (#30670)

Fixes #30433

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