Add azure async opertion header, remove LRO from PUT rulesets

specification/cdn/resource-manager/Microsoft.Cdn/stable/2021-06-01/afdx.json

@@ -2197,10 +2197,6 @@
               "$ref": "#/definitions/AfdErrorResponse"
             }
           }
-        },
-        "x-ms-long-running-operation": true,
-        "x-ms-long-running-operation-options": {
-          "final-state-via": "azure-async-operation"
         }
       },
       "delete": {
@@ -4538,7 +4534,7 @@
       ],
       "type": "string",
       "x-ms-enum": {
-        "name": "AfdSecretType",
+        "name": "SecretType",
         "modelAsString": true
       }
     },

specification/cdn/resource-manager/Microsoft.Cdn/stable/2021-06-01/examples/AFDCustomDomains_Update.json

@@ -46,6 +46,9 @@
       }
     },
     "202": {
+      "headers": {
+        "azure-asyncoperation": "https://management.azure.com/subscriptions/subid/resourcegroups/resourceGroupName/providers/Microsoft.Cdn/operationresults/operationId?api-version=2021-06-01"
+      },
       "body": {
         "id": "/subscriptions/subid/resourcegroups/RG/providers/Microsoft.Cdn/profiles/profile1/domains/domain1",
         "name": "domain1",