Upload values file in artifacts

What does this MR do and why?

due to recent reworks, the ENV_NAME variable and so the path of the values file to use is no more available outside of the job itself leading to artifacts path being incomplete.

This MR change the deployment template to create a copy of the final values file used by the deployment and put it in a hardcoded path ci-environment-values.yaml, name can be discussed @mederic.deverdilhac ;) and we refer to this path in the artifacts definition

Related reference(s)

close #1746 (closed)