Fix docker caching by resetting cache only when mono changes (#38972)
Fix docker caching by resetting cache only when mono changes (#38972)


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