ci: Deploy container images to OSTC docker registry

The EF infrastructure (GitLab) doesn't support image registry. This
moves the CI logic of building and deploying all the container images to
the OSTC instance while EF catches up[1].

[1] eclipsefdn/helpdesk#1108



Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>