Allow usage as an step on pipeline

As Lambda is able to do copying of image from ECR to another repo, it would be nice to be able to add it also as part of pipeline (copying needed for compliance reasons).

That way we could see if it succeeds, and reply if there is some hickup. But not block deployment due to some hickup.

Need would mostly be another class, and both could utilize quite a lot of same code that already exists.

Start by reading the existing Lambda-based ECR image-copy implementation and identify the entry point used for deployment integration. Done means a separate pipeline step can perform the copy, report success or failure, and avoid blocking deployment when the copy has a hiccup.

Written by the indexing model from the issue text.