Added subscriptionId and resourceGroupName in Server properties (#13059)

* Added subscriptionId and resourceGroupName in properties to enable cross-sub restore

* fix for preview version

Author: melihmutlu

specification/postgresql/resource-manager/Microsoft.DBforPostgreSQL/preview/2020-02-14-preview/examples/ServerCreatePointInTimeRestore.json

@@ -9,6 +9,8 @@
       "properties": {
         "createMode": "PointInTimeRestore",
         "sourceServerName": "sourcePgServerName",
+        "sourceSubscriptionId": "ffffffff-ffff-ffff-ffff-ffffffffffff",
+        "sourceResourceGroupName": "RestoreFromResourceGroup",
         "pointInTimeUTC": "2020-06-30T23:41:49.000Z"
       }
     }

specification/postgresql/resource-manager/Microsoft.DBforPostgreSQL/preview/2020-02-14-preview/postgresql.json

@@ -1270,6 +1270,14 @@
           "type": "string",
           "description": "The source PostgreSQL server name to restore from."
         },
+        "sourceSubscriptionId": {
+          "type": "string",
+          "description": "The subscription id of source serve PostgreSQL server name to restore from."
+        },
+        "sourceResourceGroupName": {
+          "type": "string",
+          "description": "The resource group name of source serve PostgreSQL server name to restore from."
+        },
         "pointInTimeUTC": {
           "type": "string",
           "format": "date-time",

specification/postgresql/resource-manager/Microsoft.DBforPostgreSQL/preview/2020-02-14-privatepreview/examples/ServerCreatePointInTimeRestore.json

@@ -9,6 +9,8 @@
       "properties": {
         "createMode": "PointInTimeRestore",
         "sourceServerName": "sourcePgServerName",
+        "sourceSubscriptionId": "ffffffff-ffff-ffff-ffff-ffffffffffff",
+        "sourceResourceGroupName": "RestoreFromResourceGroup",
         "pointInTimeUTC": "2020-06-30T23:41:49.000Z"
       }
     }

specification/postgresql/resource-manager/Microsoft.DBforPostgreSQL/preview/2020-02-14-privatepreview/postgresql.json

@@ -1548,6 +1548,14 @@
           "type": "string",
           "description": "The source PostgreSQL server name to restore from."
         },
+        "sourceSubscriptionId": {
+          "type": "string",
+          "description": "The subscription id of source PostgreSQL server name to restore from."
+        },
+        "sourceResourceGroupName": {
+          "type": "string",
+          "description": "The resource group name of source PostgreSQL server name to restore from."
+        },
         "pointInTimeUTC": {
           "type": "string",
           "format": "date-time",