Manage capd-preview as a child pipeline

What does this MR do and why?

This MR change the capd-preview jobs to use the same logic as the other deployment jobs (with a child pipeline that import: .gitlab/ci/deployment-pipeline.yml ).

The deployment rules are the same + change on: .gitlab/ci/pipeline-deploy-capd-preview.yml

doing this fix allow use to have the same workflow for retrieving artifacts etc..

Related reference(s)

close #1220 (closed)

Test coverage