Signed-off-by: Rémy Coutable <remy@rymai.me>

This whitelists all existing offenses for the various CodeReuse cops, of
which most are triggered by the CodeReuse/ActiveRecord cop.

This whitelists all existing places where we use "destroy_all".

For directories application_settings --> labels.

Partially addresses #47424.

Adds a rubocop rule (with autocorrect) to ensure line break after guard clauses.

This reverts commit cb10b725c8929b8b4460f89c9d96c773af39ba6b.

Fixes #24021