Update dependencies from https://github.com/dotnet/arcade build 20210818.12 (#11594)

[main] Update dependencies from dotnet/arcade
- Coherency Updates:
  - Microsoft.SourceLink.GitHub: from 1.1.0-beta-21416-05 to 1.1.0-beta-21417-01 (parent: Microsoft.DotNet.Arcade.Sdk)
  - Microsoft.DotNet.XliffTasks: from 1.0.0-beta.21414.1 to 1.0.0-beta.21417.1 (parent: Microsoft.DotNet.Arcade.Sdk)

eng/common/tools.sh

@@ -399,6 +399,13 @@ function StopProcesses {
   return 0
 }
 
+function TryLogClientIpAddress () {
+  echo 'Attempting to log this client''s IP for Azure Package feed telemetry purposes'
+  if command -v curl > /dev/null; then
+    curl -s 'http://co1.msedge.net/fdv2/diagnostics.aspx' | grep ' IP: '
+  fi
+}
+
 function MSBuild {
   local args=$@
   if [[ "$pipelines_log" == true ]]; then