Update dependencies from https://github.com/dotnet/arcade build 20240624.7

Microsoft.DotNet.Arcade.Sdk , Microsoft.DotNet.Helix.Sdk , Microsoft.DotNet.SignTool , Microsoft.DotNet.XUnitExtensions
 From Version 8.0.0-beta.24311.3 -> To Version 8.0.0-beta.24324.7

Author: dotnet-maestro[bot]

NuGet.config

@@ -24,6 +24,7 @@
     <!--  End: Package sources from dotnet-runtime -->
     <!--  Begin: Package sources from dotnet-templating -->
     <add key="darc-pub-dotnet-templating-7248c3c" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-templating-7248c3c1/nuget/v3/index.json" />
+    <add key="darc-pub-dotnet-templating-7248c3c-5" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-templating-7248c3c1-5/nuget/v3/index.json" />
     <add key="darc-pub-dotnet-templating-7248c3c-3" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-templating-7248c3c1-3/nuget/v3/index.json" />
     <add key="darc-pub-dotnet-templating-7248c3c-2" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-templating-7248c3c1-2/nuget/v3/index.json" />
     <add key="darc-pub-dotnet-templating-7248c3c-1" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-templating-7248c3c1-1/nuget/v3/index.json" />