Webhook doesn't send on branch delete event after merge in pull request

[matrozov]

• Gitea version (or commit ref): 1.11.0+dev-333-g7b7d382b8
• Git version: not needed
• Operating system: not needed
• Database (use [x]):
  • PostgreSQL
  • MySQL
  • MSSQL
  • SQLite
• Can you reproduce the bug at https://try.gitea.io:
  • Yes (provide example URL)
  • No
  • Not relevant
• Log gist:

Description

After a successful merge in pull-request, the interface suggests deleting the branch from which the pull was made. With this deletion, the webhook does not receive a notification about the removal of a branch, although deleting branches from outside causes such a message. In the images below you can see that the brunch was deleted after the pull request, but in webhook the last message is closing the pull request itself.

Screenshots

[lunny]

duplicated with #6181