Add the new feed (#17842)

Author: mattleibow

Diff for: NuGet.config

@@ -24,11 +24,13 @@
     <!-- Added manually for dotnet/runtime 7.0.12 -->
     <add key="darc-pub-dotnet-emsdk-9506882" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-emsdk-95068821/nuget/v3/index.json" />
     <add key="darc-pub-dotnet-runtime-26e0f82" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-runtime-26e0f822/nuget/v3/index.json" />
+    <add key="darc-int-8-0-100-rc-2-23502-2-shipping-signed" value="https://pkgs.dev.azure.com/dnceng/internal/_packaging/8-0-100-rc-2-23502-2-shipping-signed/nuget/v3/index.json" />
   </packageSources>
   <activePackageSource>
     <add key="All" value="(Aggregate source)" />
   </activePackageSource>
   <disabledPackageSources>
     <add key="wasdk-internal" value="true" />
+    <add key="darc-int-8-0-100-rc-2-23502-2-shipping-signed" value="true" />
   </disabledPackageSources>
 </configuration>