- On user deletion, delete action runners that the user has created.
- Add a database consistency check to remove action runners that have
nonexistent belonging owner.
- Resolves https://codeberg.org/forgejo/forgejo/issues/1720
(cherry picked from commit 
		
	
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| .. | ||
| avatar.go | ||
| delete.go | ||
| user.go | ||
| user_test.go | ||