Include SystemAssigned,UserAssigned (Azure#32826)

Author: nasc17

specification/postgresql/resource-manager/Microsoft.DBforPostgreSQL/preview/2024-11-01-preview/FlexibleServers.json

@@ -1058,7 +1058,8 @@
           "enum": [
             "None",
             "UserAssigned",
-            "SystemAssigned"
+            "SystemAssigned",
+            "SystemAssigned,UserAssigned"
           ],
           "x-ms-enum": {
             "name": "IdentityType",

specification/postgresql/resource-manager/Microsoft.DBforPostgreSQL/stable/2024-08-01/FlexibleServers.json

@@ -1029,11 +1029,12 @@
         },
         "type": {
           "type": "string",
-          "description": "the types of identities associated with this resource; currently restricted to 'None and UserAssigned'",
+          "description": "the types of identities associated with this resource",
           "enum": [
             "None",
             "UserAssigned",
-            "SystemAssigned"
+            "SystemAssigned",
+            "SystemAssigned,UserAssigned"
           ],
           "x-ms-enum": {
             "name": "IdentityType",