Remove visual tests for the intersection observer component
These tests are flaky by nature and there's very little benefit in visually testing them since the component itself is invisible.
However, I have no idea how to remove these tests, or if we even can.
For example:
This infinitely scrolled list has loaded 60 items in one case, but only 40 in the other. This is because it fetches 20 at a time and may not have finished before the snapshot is taken.
Pipeline failure example: https://gitlab.com/gitlab-org/gitlab-ui/-/jobs/460237942
cc @ealcantara
Edited by Miguel Rincon