Add blacklist and whitelist to the list of flagwords

Seems all instances have been captured and deprecations done for the path_alias stuff already.

It looks like chromedriver have deprecated --whitelisted-ips and replaced it with --allowed-ips, let's see if this works.

Re-ran tests and all are passing.

catch → closed merge request !9372

Every time we tried to replace blacklist/whitelist we ended up with a much clearer API afterwards, so makes sense to disallow them.

Committed/pushed to 11.x, thanks!