Merged PR 39108: Updated restore-toolset.sh - skip toolset for sourcebuild

Updated restore-toolset.sh - skip toolset for sourcebuild

Author: vseanreesermsft

eng/restore-toolset.sh

@@ -7,7 +7,7 @@ function InitializeCustomSDKToolset {
 
   # The following frameworks and tools are used only for testing.
   # Do not attempt to install them in source build.
-  if [[ "${DotNetBuildFromSource:-}" == "true" ]]; then
+  if [[ $properties == *"ArcadeBuildFromSource=true"* ]]; then
     return
   fi