Handle PR changes in the root of the repository (Azure#39771)

* Handle PR changes in the root of the repository

* dedupe the changedServices list prior to processing

Author: JimSuplizio

eng/scripts/Language-Settings.ps1

@@ -62,11 +62,17 @@ function Get-python-AdditionalValidationPackagesFromPackageSet {
         $changedServices += $pathComponents[1]
       }
 
-      # handle any changes under sdk/<file>.<extension>
-      if ($pathComponents.Length -eq 2 -and $pathComponents[0] -eq "sdk") {
+      # handle any changes under sdk/<file>.<extension> as well as any
+      # changes to the root of the repository. Changes to the root of
+      # repository is the case where pathComponents.Lenght -eq 1
+      if (($pathComponents.Length -eq 2 -and $pathComponents[0] -eq "sdk") -or
+          ($pathComponents.Length -eq 1)) {
         $changedServices += "template"
       }
     }
+
+    # dedupe the changed service list before processing
+    $changedServices = $changedServices | Get-Unique
     foreach ($changedService in $changedServices) {
       $additionalPackages = $AllPkgProps | Where-Object { $_.ServiceDirectory -eq $changedService }
 
@@ -91,8 +97,6 @@ function Get-python-AdditionalValidationPackagesFromPackageSet {
     $othersChanged = $targetedFiles | Where-Object { isOther($_) }
   }
 
-  $changedServices = $changedServices | Get-Unique
-
   if ($toolChanged) {
     $additionalPackages = @(
       "azure-storage-blob",