gitlab-ci: Start using docker

To not waste time on reinstalling all the deps each time

Signed-off-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
2 jobs for master in 5 minutes and 9 seconds (queued for 1 second)
Status Job ID Name Coverage
  Containers
passed #75606
containers:patchwork-testing

00:03:15

 
  Test
passed #75607
test

00:01:53