Don't use docker for sourcebuild leg (#51815)
Don't use docker for sourcebuild leg (#51815)


shyamnamboodiripad/roslyn,physhi/roslyn,sharwell/roslyn,jasonmalinowski/roslyn,physhi/roslyn,weltkante/roslyn,weltkante/roslyn,physhi/roslyn,KevinRansom/roslyn,mavasani/roslyn,mavasani/roslyn,jasonmalinowski/roslyn,eriawan/roslyn,eriawan/roslyn,KevinRansom/roslyn,wvdd007/roslyn,CyrusNajmabadi/roslyn,bartdesmet/roslyn,bartdesmet/roslyn,wvdd007/roslyn,KevinRansom/roslyn,weltkante/roslyn,dotnet/roslyn,dotnet/roslyn,eriawan/roslyn,jasonmalinowski/roslyn,AmadeusW/roslyn,diryboy/roslyn,mavasani/roslyn,wvdd007/roslyn,bartdesmet/roslyn,sharwell/roslyn,shyamnamboodiripad/roslyn,sharwell/roslyn,AmadeusW/roslyn,diryboy/roslyn,diryboy/roslyn,shyamnamboodiripad/roslyn,CyrusNajmabadi/roslyn,CyrusNajmabadi/roslyn,AmadeusW/roslyn,dotnet/roslyn