Try to add danger comments

What does this MR do and why?

Check on CI if the MR removed any file that was in a .rubocop_todo . Also, add a bin/rubocop-outdated-todo --fix to help contributors to remove deleted files from rubocop todos.

TODO

• Add the bin/rubocop-outdated-todo on a CI stage
• Create bin/rubocop-outdated-todo --fix

Screenshots or screen recordings

• Example of bin/rubocop-outdated-todo-check output (from a test job):

$ bin/rubocop-outdated-todo
'.rubocop_todo/api/ensure_string_detail.yml' contains the following removed files:
- 'ee/lib/api/analytics/group_activity_analytics.rb'
It looks like you remove files and did not remove their related rubocop todos.
>> Try running `bin/rubocop-outdated-todo --fix` to fix that

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.