Add possibility to create user in the Remote User mode (#19963)

(cherry picked from commit cdd9ea6)

airflow/www/views.py

@@ -4731,3 +4731,28 @@ class CustomUserOIDModelView(MultiResourceUserMixin, UserOIDModelView):
 
 class CustomUserRemoteUserModelView(MultiResourceUserMixin, UserRemoteUserModelView):
     """Customize permission names for FAB's builtin UserRemoteUserModelView."""
+
+    _class_permission_name = permissions.RESOURCE_USER
+
+    class_permission_name_mapping = {
+        'userinfoedit': permissions.RESOURCE_MY_PROFILE,
+        'userinfo': permissions.RESOURCE_MY_PROFILE,
+    }
+
+    method_permission_name = {
+        'add': 'create',
+        'userinfo': 'read',
+        'download': 'read',
+        'show': 'read',
+        'list': 'read',
+        'edit': 'edit',
+        'userinfoedit': 'edit',
+        'delete': 'delete',
+    }
+
+    base_permissions = [
+        permissions.ACTION_CAN_CREATE,
+        permissions.ACTION_CAN_READ,
+        permissions.ACTION_CAN_EDIT,
+        permissions.ACTION_CAN_DELETE,
+    ]