Please use net50 target dll instead of .NETStandard dll in .net runtime shared dlls

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Describe the bug

I use Visual Studio 2022 and C++ cli and .net 5. (I will use .net 6).

Because C++ cli doesn't support mixed dll type, and it can't use .NET Standard dlls.

I find that there are many .NET Standard dlls in runtime shared dlls, such as `Microsoft.Extensions.Hosting.Abstractions.dll` and `Microsoft.Extensions.Hosting.dll`.

So my application doesn't work!!!!!!!! (my C++ clr application reference .NET 5 dll which use Grpc.AspNetCore and Grpc.AspNetCore.Web)

### Expected Behavior

C++ clr reference .Net 5 dll will work.

### Steps To Reproduce

_No response_

### Exceptions (if any)

_No response_

### .NET Version

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### Anything else?

_No response_