update provisioning admin username to "ek-provadmin" and add domain controller check

Remove-EmberkomProvisioningAdminUser.ps1

@@ -1,5 +1,11 @@
 # Define the username of the provisioning admin account
-$ProvisioningAdminUsername = "EmberkomProvisioningAdmin"
+$ProvisioningAdminUsername = "ek-provadmin"
+
+# Exit if this is a domain controller
+If ( $(Get-CimInstance -ClassName Win32_OperatingSystem -Property ProductType | Select-Object -ExpandProperty ProductType) -eq "2" ) {
+    Write-Output "Cannot create or modify local accounts on a domain controller"
+    Exit 0
+}
 
 # Get the provisioning admin user account
 $ProvisioningAdmin = Get-LocalUser -Name $ProvisioningAdminUsername -ErrorAction SilentlyContinue