[gitlab-ci] add required image:pull-policy
without this there's an error:
ERROR: Preparation failed: failed to pull image: pull_policy ([always]) defined in Runner config (default) is not one of the allowed_pull_policies ([if-not-present])
without this there's an error:
ERROR: Preparation failed: failed to pull image: pull_policy ([always]) defined in Runner config (default) is not one of the allowed_pull_policies ([if-not-present])