Migrate Azure.AI.Vision.Face to new generator

[JoshLove-msft]

• Update tsp-location.yaml to have the following:
  • emitterPackageJsonPath: eng/azure-typespec-http-client-csharp-emitter-package.json
  • commit: 06308c14162a70091d5ea4b079ae8740383a9e00
• Add <IncludeAutorestDependency>false</IncludeAutorestDependency> to the csproj.
• Run dotnet build /t:GenerateCode
• Update any instances of CodeGenClient and CodeGenModel with CodeGenType.
• Run dotnet build
• Run eng/scripts/Export-Api.ps1 face
• Report back any build errors.
• Once everything builds successfully, run dotnet test at project root.
• Report back any test failures.
• Once tests are all passing, run ./doc/GeneratorMigration/Library_Inventory.ps1 from the repo root.

[github-actions]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @dipidoo @Han-msft @leareai @longli0 @ShaoAnLin.