Now that it has been decided to backport php82 to Moodle 4.2.x, we
can already fix the php versions to be checked by the coding
standard (they were previously open for the branch).
This change reduces the priority of the shipped phpcs configuration to
allow for local overrides.
This is beneficial in several situations:
- when users wish to apply stricter or additional standards
- when the integration team wishes to trial new rules