Revert dotnet-templating feed

Author: Jason Zhai

NuGet.config

@@ -50,6 +50,7 @@
     <add key="darc-int-dotnet-runtime-e36e4d1-1" value="https://pkgs.dev.azure.com/dnceng/internal/_packaging/darc-int-dotnet-runtime-e36e4d1a-1/nuget/v3/index.json" />
     <!--  End: Package sources from dotnet-runtime -->
     <!--  Begin: Package sources from dotnet-templating -->
+    <add key="darc-pub-dotnet-templating-8fec3e9" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-templating-8fec3e94/nuget/v3/index.json" />
     <add key="darc-pub-dotnet-templating-bb74178" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-templating-bb741780/nuget/v3/index.json" />
     <add key="darc-pub-dotnet-templating-bb74178-4" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-templating-bb741780-4/nuget/v3/index.json" />
     <add key="darc-pub-dotnet-templating-bb74178-3" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-templating-bb741780-3/nuget/v3/index.json" />