d2l-input-time-range visual-diff test skipped

[svanherk]

The opened behavior visual-diff tests for input-time-range are flakey and were skipped in https://github.com/BrightspaceUI/core/pull/1724.

I was able to reproduce the flakiness locally pretty easily. I tried the following, and nothing consistently solved the issue:

• Waiting an animation frame before each test
• Adding captureBeyondViewport: false
• Waiting for updateComplete on a number of internal elements, like the dropdown, menu, etc. before trying to measure the rect