Test Assertions 3.1, 3.2

These are basically just copies of the `pointerevent_pointermove_*` files with updates to test `pointerup` instead of `pointermove`.
Understood. I think ultimately it's a question of whether a user error (in not following the test instructions precisely) should be treated as a test error (and I think this applies to other tests too). In particular, if a user fails to follow the instructions, would it result in a false positive?
(Just thinking out loud. It's not really a question that would block this PR or anything.)

I'm fine with removing either.