[py] Fix test args for --headless and --bidi#15567
Merged
cgoldberg merged 7 commits intoSeleniumHQ:trunkfrom Apr 5, 2025 
Merged
 [py] Fix test args for --headless and --bidi#15567cgoldberg merged 7 commits intoSeleniumHQ:trunkfrom 
cgoldberg merged 7 commits intoSeleniumHQ:trunkfrom