add annotation for labservices (#19884)

Author: j-zhong-ms

specification/labservices/resource-manager/Microsoft.LabServices/preview/2021-11-15-preview/Skus.json

@@ -121,6 +121,9 @@
           "items": {
             "$ref": "#/definitions/LabServicesSkuCapabilities"
           },
+          "x-ms-identifiers": [
+            "name"
+          ],
           "readOnly": true
         },
         "locations": {
@@ -137,6 +140,7 @@
           "items": {
             "$ref": "#/definitions/LabServicesSkuCost"
           },
+          "x-ms-identifiers": [],
           "readOnly": true
         },
         "restrictions": {
@@ -145,6 +149,7 @@
           "items": {
             "$ref": "#/definitions/LabServicesSkuRestrictions"
           },
+          "x-ms-identifiers": [],
           "readOnly": true
         }
       }
@@ -159,6 +164,7 @@
           "items": {
             "$ref": "#/definitions/LabServicesSku"
           },
+          "x-ms-identifiers": [],
           "readOnly": true
         },
         "nextLink": {