Add more UI tests for ink! chain extensions

[Robbepop]

Currently we only have a single passing UI test for ink! chain extensions.
This is nowhere near where we want to be with respect of user facing tests.

Ideally we have some smaller passing UI tests that don't try to cover everything like the current existing passing UI test.
Also we'd have a failing UI test for all the things we explicitly want to catch, warn or error.

The new ink! chain extension UI tests should be structured in the folder like the other UI tests of the other ink! proc. macros with pass and fail folders.