CI: use wayland-ci-templates to manage the images

There shouldn't be a difference for users, but this way we do manage
all of our containers from freedesktop.org

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
3 jobs for wip/ci-templates in 6 minutes and 6 seconds (queued for 10 seconds)
latest
Status Job ID Name Coverage
  Docker Image
passed #198352
debian-testing

00:00:28

 
  Build And Test
passed #198353
autotools-build-and-test

00:05:37

passed #198354
meson-build-and-test

00:01:49