test: add ibc v2 relaying #8559
                
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Description
This is not done. It is right now meant to show how to do ibc v2 relaying in ibc-go. We'll stabilize the go-relayer-api package and sort out some issues that arose from these initial tests.
One issue, in particular, is that it currently only works with a single validator node.
So for those using this as a basis for new tests, make sure to set
numValidators: 1in the e2e config until this has been resolved.Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.
docs/) if anything is changed.godoccomments if relevant.Files changedin the GitHub PR explorer.