text: Title: TypeError: GraphQLView() received an invalid keyword 'subscriptions_enabled'. as_view only accepts arguments that are already attributes of the class.
  Body: ## Describe the Bug
  
  When using subscriptions in a view as [according to the docs here](https://strawberry.rocks/docs/django/guide/subscriptions), you update your urls.py to look like:
  
  ```py
  urlpatterns = [
    ...
      path(
          'graphql/',
          AsyncGraphQLView.as_view(
              schema=schema,
              graphiql=settings.DEBUG,
              subscriptions_enabled=True,
          ),
      ),
      ...
  ]
  ```
  
  However, this causes an error during testing:
  ```
  TypeError: AsyncGraphQLView() received an invalid keyword 'subscriptions_enabled'. as_view only accepts arguments that are already attributes of the class.
  ```
  
  **The same error occurs using `GraphQLView()` rather than `AsyncGraphQLView()`.**
  
  
  ## System Information
  
  ```
  # from my pyproject.toml
  strawberry-graphql = {version = "^0.246.2", extras = ["debug-server"]}
  strawberry-graphql-django = "^0.49.0"
  ```