Add internal sources to smoke-test nuget.config

Author: dseefeld

smoke-testNuGet.Config

@@ -3,6 +3,23 @@
   <packageSources>
     <!--To inherit the global NuGet package sources remove the <clear/> line below -->
     <clear />
+    <!--Begin: Package sources managed by Dependency Flow automation. Do not edit the sources below.-->
+    <!--  Begin: Package sources from dotnet-aspnetcore -->
+    <add key="darc-int-dotnet-aspnetcore-440dadc" value="https://pkgs.dev.azure.com/dnceng/_packaging/darc-int-dotnet-aspnetcore-440dadc0/nuget/v3/index.json" />
+    <!--  End: Package sources from dotnet-aspnetcore -->
+    <!--  Begin: Package sources from dotnet-aspnetcore-tooling -->
+    <add key="darc-int-dotnet-aspnetcore-tooling-aec2954" value="https://pkgs.dev.azure.com/dnceng/_packaging/darc-int-dotnet-aspnetcore-tooling-aec2954c/nuget/v3/index.json" />
+    <!--  End: Package sources from dotnet-aspnetcore-tooling -->
+    <!--  Begin: Package sources from dotnet-core-setup -->
+    <add key="darc-int-dotnet-core-setup-826c2c2" value="https://pkgs.dev.azure.com/dnceng/_packaging/darc-int-dotnet-core-setup-826c2c2f/nuget/v3/index.json" />
+    <!--  End: Package sources from dotnet-core-setup -->
+    <!--  Begin: Package sources from dotnet-extensions -->
+    <add key="darc-int-dotnet-extensions-1c79cde" value="https://pkgs.dev.azure.com/dnceng/_packaging/darc-int-dotnet-extensions-1c79cde9/nuget/v3/index.json" />
+    <!--  End: Package sources from dotnet-extensions -->
+    <!--  Begin: Package sources from dotnet-templating -->
+    <add key="darc-pub-dotnet-templating-f8760d0" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-templating-f8760d03/nuget/v3/index.json" />
+    <!--  End: Package sources from dotnet-templating -->
+    <!--End: Package sources managed by Dependency Flow automation. Do not edit the sources above.-->
     <add key="source-built-packages" value="SOURCE_BUILT_PACKAGES" />
     <add key="dotnet-public" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-public%40Local/nuget/v3/index.json" />
   </packageSources>