Consolidate pointer attribute testing

The primary goal of this patch was to address memory leaks. These leaks were likely due to pending promises at the completion of the test.

The 3 tests for hover pointers, non-hover pointers and hover with right click were all very similar in structure and were consolidated in the patch. We now have 5 variants instead of 3 separate tests.

In the process the tests were modernized to be promise tests instead of an async test. The structure was reformatted to remove the manual test feel.

Bug: 1430360, 1499775, 1446799 Change-Id: Ia6dc48405d2e2197e3c020fdb803d836043698f5 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5229777 Commit-Queue: Kevin Ellis kevers@chromium.org Reviewed-by: Mustaq Ahmed mustaq@chromium.org Cr-Commit-Position: refs/heads/main@{#1252074}