Add Blip and Blip2 for pipeline tests
# What does this PR do?

A continuation of (not merged) #21802.

@NielsRogge I will add you as the contributor.
@Narsil Just in case you want to take a look too, as you reviewed #21904, and asked for adding the tests.
_The documentation is not available anymore as the PR was closed or merged._<|||||>Thank you ! !!!