Allow accessing registry of different account (--registry-id)

[jakobmagiera]

What would you like to be added

Currently the orb does not use the --registry-id parameter and defaults to the account id of the current account. We use a technical user that accesses the registry of a different account. The orb does not support this, so we had to manually run the aws ecr commands the orb uses internally, passing the --registry-id parameter.

Why is this needed

This will allow working with a different account than the one the registry is contained in.