Bug 1625864 - Rename mac link test. r=morgan

I want to generalize it for other link stuff. Need a separate commit or
it is not recognized as a move, and won't retain history. For some reason.

Differential Revision: https://phabricator.services.mozilla.com/D71259

accessible/tests/browser/mac/browser.ini

@@ -17,4 +17,4 @@ support-files =
 [browser_table.js]
 [browser_selectables.js]
 [browser_toggle_radio_check.js]
-[browser_link_visited.js]
+[browser_link.js]