webhooks: Migrate to check_send_stream_message.

This commit migrates all webhooks to use check_send_stream_message
instead of check_send_message. The only two webhooks that still
use check_send_message are our yo and teamcity webhooks. They
both use check_send_message for private messages.

zerver/webhooks/sentry/view.py

@@ -1,7 +1,7 @@
 # Webhooks for external integrations.
 from django.http import HttpRequest, HttpResponse
 from zerver.models import UserProfile
-from zerver.lib.actions import check_send_message
+from zerver.lib.actions import check_send_stream_message
 from zerver.lib.response import json_success
 from zerver.decorator import REQ, has_request_variables, api_key_only_webhook_view
 from typing import Any, Dict
@@ -16,5 +16,5 @@ def api_sentry_webhook(request, user_profile,
     body = "New {} [issue]({}): {}.".format(payload['level'].upper(),
                                             payload.get('url'),
                                             payload.get('message'))
-    check_send_message(user_profile, request.client, 'stream', [stream], subject, body)
+    check_send_stream_message(user_profile, request.client, stream, subject, body)
     return json_success()