Merge branch 'container_reg_spec_docker_pull' into 'master'

Add docker pull to Container Registry CVS E2E spec

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/171087



Merged-by: Andrejs Cunskis <acunskis@gitlab.com>
Approved-by: Andrejs Cunskis <acunskis@gitlab.com>
Co-authored-by: Will Meek <wmeek@gitlab.com>