Set server GC for F# FSC/FSI

[vzarytovskii]

As we figured out here, SDK is not getting runtimeconfig.json files from F# itself, but from the https://github.com/dotnet/sdk/blob/release/7.0.2xx/src/Layout/tool_fsharp/tool_fsc.csproj

sdk/src/Layout/redist/targets/GenerateLayout.targets

Lines 254 to 262 in a503394

	<!-- Deploy deps and runtime config for fsc.exe and fsi.exe. Both apps have exactly the same dependencies so this is Ok -->
	<Copy SourceFiles="$(FSharpDirectory)/tool_fsc.runtimeconfig.json;
	$(FSharpDirectory)/tool_fsc.deps.json;"
	DestinationFiles="$(FSharpDirectory)/fsc.runtimeconfig.json;
	$(FSharpDirectory)/fsc.deps.json;"/>
	<Copy SourceFiles="$(FSharpDirectory)/tool_fsc.runtimeconfig.json;
	$(FSharpDirectory)/tool_fsc.deps.json;"
	DestinationFiles="$(FSharpDirectory)/fsi.runtimeconfig.json;
	$(FSharpDirectory)/fsi.deps.json;"/>

Hopefully, it's the proper place to make the change, if not, please advise what would be thecorrect one.

Update: will also need to verify that these changes do affect runtimeconfig, when build is complete.

[baronfel]

I cloned this down, built it, and verified that the server GC was set in the runtimeconfig.json:

../FSharp on vzarytovskii-patch-1
11:34:56 ❯ cat *.runtime*
{
  "runtimeOptions": {
    "tfm": "net8.0",
    "framework": {
      "name": "Microsoft.NETCore.App",
      "version": "8.0.0-alpha.1.22605.1"
    },
    "configProperties": {
      "System.GC.Server": true
    }
  }
}
{
  "runtimeOptions": {
    "tfm": "net8.0",
    "framework": {
      "name": "Microsoft.NETCore.App",
      "version": "8.0.0-alpha.1.22605.1"
    },
    "configProperties": {
      "System.GC.Server": true
    }
  }
}

This was on the main-targeted form of this PR, but the result should be the same.