[release/7.0.1xx] installer fails to build using a sdk+packages built by installer

[tmds]

If you build installer using an SDK and packages from a previous installer build, the build fails.

runtime repo's crossgen2.csproj project fails to resolve the RuntimeIdentifier.
I've patched it in dotnet/installer#14549 using:

-    <RuntimeIdentifiers Condition="'$(DotNetBuildFromSource)' == 'true'">$(PackageRID)</RuntimeIdentifiers>
+    <RuntimeIdentifier Condition="'$(DotNetBuildFromSource)' == 'true'">$(PackageRID)</RuntimeIdentifier>
+    <AppendRuntimeIdentifierToOutputPath Condition="'$(RunningPublish)' != 'true'">false</AppendRuntimeIdentifierToOutputPath>

The fsharp repo fails with:

    FSharp.Build -> /home/tmds/tarball61/src/fsharp/artifacts/source-build/self/src/artifacts/bin/FSharp.Build/Proto/netstandard2.0/FSharp.Build.dll
    FSharp.Compiler.Service -> /home/tmds/tarball61/src/fsharp/artifacts/source-build/self/src/artifacts/bin/FSharp.Compiler.Service/Proto/netstandard2.0/FSharp.Compiler.Service.dll
FSC : error : no entrypoint specified in executable binary [/home/tmds/tarball61/src/fsharp/artifacts/source-build/self/src/src/fsc/fscProject/fsc.fsproj::TargetFramework=net7.0] [/home/tmds/tarball61/Tools/source-built/Microsoft.DotNet.Arcade.Sdk/tools/Build.proj]
##vso[task.logissue type=error;sourcepath=FSC;linenumber=0;columnnumber=0;code=;]no entrypoint specified in executable binary [/home/tmds/tarball61/src/fsharp/artifacts/source-build/self/src/src/fsc/fscProject/fsc.fsproj::TargetFramework=net7.0%5D
    fsc -> /home/tmds/tarball61/src/fsharp/artifacts/source-build/self/src/artifacts/bin/fsc/Proto/net7.0/fsc.dll
FSC : error : no entrypoint specified in executable binary [/home/tmds/tarball61/src/fsharp/artifacts/source-build/self/src/src/fsi/fsiProject/fsi.fsproj::TargetFramework=net7.0] [/home/tmds/tarball61/Tools/source-built/Microsoft.DotNet.Arcade.Sdk/tools/Build.proj]
##vso[task.logissue type=error;sourcepath=FSC;linenumber=0;columnnumber=0;code=;]no entrypoint specified in executable binary [/home/tmds/tarball61/src/fsharp/artifacts/source-build/self/src/src/fsi/fsiProject/fsi.fsproj::TargetFramework=net7.0%5D
    fsi -> /home/tmds/tarball61/src/fsharp/artifacts/source-build/self/src/artifacts/bin/fsi/Proto/net7.0/fsi.dll

[tmds]

cc @crummel @MichaelSimons

[MichaelSimons]

The crossgen2 issue is tracked with dotnet/sdk#27985 and already has a fix. @crummel has been investigating the FSharp issue.

[MichaelSimons]

This was fixed with dotnet/fsharp#13963 and fsharp also checked in a fix for it which has already flown into 7.0 with dotnet/installer#14608