Programmatically associate error messages with inputs

Rebased and address the feedback from alex.

Unfortunately this doesn't work. It was really broken and the ID attachement didn't seem to work at all. I fixed that but it only works for simple elements. When trying to attach to groups like radios or checkboxes, the ID in displayErrorMessages is the collection, but the ID in setElementErrorsFromFormState is the ID of the specific input and these don't match.

For example testing on umami search,

edit-type--error-message

but the element is

edit-type-article

referencing

edit-type-article--error-message

Definitely needs a lot of tests.

got some tests in place that identify some of the pending issues. not passing because we've got some hard problems to solves still.

I have rebased both merge requests.