DomainServices: Add default value for newly added "SyncScope" property (Azure#22476)

* Update domainservices.json

* Update domainservices.json

Author: jihochang

specification/domainservices/resource-manager/Microsoft.AAD/stable/2022-09-01/domainservices.json

@@ -508,6 +508,7 @@
             "All",
             "CloudOnly"
           ],
+          "default": "All",
           "description": "All or CloudOnly, All users in AAD are synced to AAD DS domain or only users actively syncing in the cloud",
           "x-ms-enum": {
             "name": "SyncScope",

specification/domainservices/resource-manager/Microsoft.AAD/stable/2022-12-01/domainservices.json

@@ -513,6 +513,7 @@
             "All",
             "CloudOnly"
           ],
+          "default": "All",
           "description": "All or CloudOnly, All users in AAD are synced to AAD DS domain or only users actively syncing in the cloud",
           "x-ms-enum": {
             "name": "SyncScope",