merge_pr_49858

[wdspec] Address pointer navigation rounding isses of mouse target position.

This patch updates the pointer navigation tests for both BiDi
and classic WebDriver protocols to handle rounding discrepancies
when asserting mouse target positions.

Differential Revision: https://phabricator.services.mozilla.com/D232966

bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1936619
gecko-commit: 2d75a55e1b308be22b97a8d9c100f2a9e3121df9
gecko-reviewers: webdriver-reviewers, jdescottes