[API] Add Restricted Field to User (#14630)

* Expose Restricted field for User

* Add Option to Change Restricted on User via adminEditUser API

* Add test who change restricted & test if it changed it ...

* make generate-swagger

Co-authored-by: zeripath <art27@cantab.net>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

templates/swagger/v1_json.tmpl

@@ -13796,6 +13796,10 @@
           "type": "boolean",
           "x-go-name": "ProhibitLogin"
         },
+        "restricted": {
+          "type": "boolean",
+          "x-go-name": "Restricted"
+        },
         "source_id": {
           "type": "integer",
           "format": "int64",
@@ -16209,6 +16213,11 @@
           "description": "the user's username",
           "type": "string",
           "x-go-name": "UserName"
+        },
+        "restricted": {
+          "description": "Is user restricted",
+          "type": "boolean",
+          "x-go-name": "Restricted"
         }
       },
       "x-go-package": "code.gitea.io/gitea/modules/structs"