Fix handling of ignore_default_args when passed as a boolean.

[lp07]

Problem:
Passing ignore_default_args=False was sent over the wire as a boolean, but the server expects an array for ignoreDefaultArgs, resulting in:

"expected array, got boolean".

Fix:

• ignore_default_args=True → send ignoreAllDefaultArgs=True
• ignore_default_args=False → do not send ignoreDefaultArgs at all
• ignore_default_args=list → unchanged

Tests:
Added unit tests covering bool True/False and list cases across
chromium, firefox, and webkit.

Related issue: #3005

[lp07]

@microsoft-github-policy-service agree