restore mwext-Translate-phpcs-strict

The job is still triggered by Zuul via `gate-and-submit` but somehow it
was no more referenced in JJB.  That means although the job was still
around, it was no more being updated :-D

Refreshed job, it is working properly.

bug: 59860
Change-Id: I19ab13c13795c348e56122c599bf481594b62b55