Disabled Firefox and Webkit tests due to webcompat dialog issue

[jattasNI]

🧹 Tech Debt

Several dialog and drawer tests have been disabled in Firefox and Webkit due to dialogs not properly focusing shadow DOM content in those browsers.

Tracked by:

• https://webcompat.com/issues/121098
• https://bugs.webkit.org/show_bug.cgi?id=255507
• https://bugzilla.mozilla.org/show_bug.cgi?id=1828398
• https://codepen.io/Westbrook/pen/VwEjLEo

Here is a sample of the failures:

Drawer with default setup focuses the first button on the drawer when it opens FAILED
Expected ... to be .... Tip: To check for deep equality, use .toEqual() instead of .toBe().
Drawer with default setup supports opening multiple drawers on top of each other FAILED
Expected ... to be .... Tip: To check for deep equality, use .toEqual() instead of .toBe().
Drawer with default setup focuses the button with autofocus when the drawer opens FAILED
Expected ... to be .... Tip: To check for deep equality, use .toEqual() instead of .toBe().
Dialog focuses the button with autofocus when the dialog opens FAILED
Expected ... to be .... Tip: To check for deep equality, use .toEqual() instead of .toBe().5#step:17:45)
Dialog supports opening multiple dialogs on top of each other FAILED
Expected ... to be .... Tip: To check for deep equality, use .toEqual() instead of .toBe().
Dialog focuses the first button on the dialog when it opens FAILED
Expected ... to be .... Tip: To check for deep equality, use .toEqual() instead of .toBe().