build: Updating mediawiki/mediawiki-codesniffer to 31.0.0
build: Updating mediawiki/mediawiki-codesniffer to 31.0.0

Additional changes:
* Replaced "jakub-onderka" packages with "php-parallel-lint".

Change-Id: Ic77c141aee22af68585831d8a0d342e6b1453561

wikimedia/mediawiki-extensions-Poem,wikimedia/mediawiki-extensions-Poem