🌱 parameterizes the e2e target and pins opm images

[perdasilva]

Description of the change:
The previous refactored parametrization of the e2e target was too restrictive. This PR re-introduces parameters to configure the e2e test command.

It has also come to our attention that opm:latest images are being used in e2e tests. This PR also pins the opm images to the relevant version of operator-registry

Motivation for the change:

Architectural changes:

Testing remarks:

Reviewer Checklist

• Implementation matches the proposed design, or proposal is updated to match implementation
• Sufficient unit test coverage
• Sufficient end-to-end test coverage
• Bug fixes are accompanied by regression test(s)
• e2e tests and flake fixes are accompanied evidence of flake testing, e.g. executing the test 100(0) times
• tech debt/todo is accompanied by issue link(s) in comments in the surrounding code
• Tests are comprehensible, e.g. Ginkgo DSL is being used appropriately
• Docs updated or added to /doc
• Commit messages sensible and descriptive
• Tests marked as [FLAKE] are truly flaky and have an issue
• Code is properly formatted

[everettraven]

Everything looks good to me from a code change perspective, but I'm not to familiar with this code base and how effective this change is. If we trust our e2e tests then LGTM :)

[tmshort]

unit tests are now failing :(
And the only change was the export‽‽

[perdasilva]

unit tests are now failing :( And the only change was the export‽‽

Flake (already investing XD - I'll get this repo stable if it kills me!)