global-regions-interact.cy.js and media-library-component-instance.cy.js are flaky

media-library-component-instance has a fix snuck into an unrelated not-yet-merged MR, but moving iterations inside the testMediaLibraryInComponentInstanceForm should take care of it. (has worked thus far at least)

There's a 2nd media library test that should get a similar change.

global-regions-interact.cy.js is the renderer crashing. This was a bigger problem with more tests before we parallelized, and this seems to be the only one continuing to suffer. It certainly can't hurt to make this the next playwright port, but a quick way that might reduce some pain here is to split it into it's own test group as it seemed like the renderer crashes were related to the number of tests in a run - but I'm not certain about this so it's only something to try if it is fast.