gitlab-ci: drop gettext from the build images

Suggested-by: Pierre-Eric Pelloux-Prayer <pelloux@gmail.com>
Signed-off-by: Eric Engestrom <eric@engestrom.ch>
Part-of: <mesa/mesa!5440>
69 jobs for !5440 with drop-translations in 21 minutes and 17 seconds (queued for 6 seconds)
merge request