Fix dotnet fsi does not support DOTNET_CLI_UI_LANGUAGE

[KevinRansom]

This fixes #40301
and fixes dotnet/fsharp#16146

This gets the SDK overridden language version and uses it to specify the fsi --preferreduilang command line argument, which is how fsi knows to do this.

--preferreduilang:<string>               Specify the preferred output language culture name (e.g. es-ES, ja-JP)

[KevinRansom]

Fix:
C:\kevinransom\sdk\artifacts\bin\redist\Debug\dotnet>set DOTNET_CLI_UI_LANGUAGE=en-En

C:\kevinransom\sdk\artifacts\bin\redist\Debug\dotnet>dotnet fsi

Microsoft (R) F# Interactive version 12.8.400.0 for F# 8.0
Copyright (c) Microsoft Corporation. All Rights Reserved.

For help type #help;;

#quit;;

C:\kevinransom\sdk\artifacts\bin\redist\Debug\dotnet>set DOTNET_CLI_UI_LANGUAGE=

C:\kevinransom\sdk\artifacts\bin\redist\Debug\dotnet>dotnet fsi

Microsoft (R) F# Interactive version 12.8.400.0 for F# 8.0
Copyright (c) Microsoft Corporation. All Rights Reserved.

For help type #help;;

#quit;;

C:\kevinransom\sdk\artifacts\bin\redist\Debug\dotnet>set DOTNET_CLI_UI_LANGUAGE=es-Es

C:\kevinransom\sdk\artifacts\bin\redist\Debug\dotnet>dotnet fsi

Microsoft (R) F# interactivo, versión 12.8.400.0 for F# 8.0
Copyright (C) Microsoft Corporation. Todos los derechos reservados.

Para obtener ayuda, escriba #help;;