webhooks: Rename api_key_only_webhook_view to webhook_view.

There are no other types of webhook views; this is more concise.

zerver/webhooks/gitlab/view.py

@@ -5,7 +5,7 @@ from typing import Any, Dict, Optional
 
 from django.http import HttpRequest, HttpResponse
 
-from zerver.decorator import api_key_only_webhook_view
+from zerver.decorator import webhook_view
 from zerver.lib.exceptions import UnsupportedWebhookEventType
 from zerver.lib.request import REQ, has_request_variables
 from zerver.lib.response import json_success
@@ -353,7 +353,7 @@ EVENT_FUNCTION_MAPPER = {
     'Pipeline Hook': get_pipeline_event_body,
 }
 
-@api_key_only_webhook_view("Gitlab")
+@webhook_view("Gitlab")
 @has_request_variables
 def api_gitlab_webhook(request: HttpRequest, user_profile: UserProfile,
                        payload: Dict[str, Any]=REQ(argument_type='body'),