[this PR accidentally still used images from our eirini fork] ENH: update to using eirini 2.0 images

[jamespollard8]

• previously, these overrides were configured to map base eirini 1.9 images to our temporarily forked eirini images

#175238690

Does this PR introduce a change to config/values.yml?

No

Acceptance Steps

PR tests pass (importantly CATS)

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[cf-gitbot]

We have created an issue in Pivotal Tracker to manage this:

https://www.pivotaltracker.com/story/show/175791580

The labels on this github issue will be updated when the story is started.