Skip functional javascript testing of the options UI for float fields

I think this got slower because of 🐛 Not able to add to List field with 0 as the first machine name. Needs work , we can actually consolidate that test case with the main list_string one, and retain the list_float coverage for now. That way we definitely don't lose test coverage but also save some iterations.

https://git.drupalcode.org/issue/drupal-3522004/-/jobs/5114056 this change is enough to have this test finish quicker than BigPipeRegressionTest, so I think it's 'good enough' until it becomes the slowest test again.

Another option here, and the first one I considered, was dropping list_float testing since we don't support adding those fields via the UI at all now.

Seems like a good consolidation to me

Fair enough. We're not losing test coverage here.

Committed and pushed 6b577ab50be to 11.x and fb605312a2e to 11.2.x. Thanks!