It is necessary that the `COMMIT_MSG` script does not interfere with
amend commits as keeping their commit message intact is necessary for
squashes to work as expected.
Adding this hook into the repo that could be used by anyone to have a
standardised way to add tags into commit messages. This also provides a
way to add chromium culprits into changes.
Resolves https://github.com/brave/brave-browser/issues/45015