Fix `$(Nullable)` condition (#32858)
Fix `$(Nullable)` condition (#32858)

- `disable` must be accounted for
- blocking dependency flow; see dotnet/aspnetcore-tooling#3618
aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore