refactor: move artifact resolution to a separate middleware

What does this MR do?

Move artifact resolution to a separate middleware.

Artifact resolution doesn't need to resolve a domain. This MR abstract it to a separate middleware so that once !738 (merged) is merged, we can delay domain resolution.

TODO

• I added the Changelog trailer (e.g. Changelog: added) to the commits that need to be included in the changelog
• I added unit tests or they are not required
• I added acceptance tests or they are not required
• I added documentation (or it's not required)
• I followed code review guidelines
• I followed Go Style guidelines