Alias firefight -> shootout

BUR #57200 has been approved by @nonamethanks.

create alias firefight -> shootout
create alias gunfight -> shootout

The current naming is a bit confusing, since there are no aliases for it, Wikipedia currently uses the term "shootout" for this scenario. I'll do two alternate BURs just in case.

BUR #57201 has been rejected.

create alias firefight -> gunfight
create alias shootout -> gunfight

Alternative BUR to be aliased to gunfight instead.

BUR #57202 has been rejected.

create alias gunfight -> firefight
create alias shootout -> firefight

Another alternative BUR using these terms as utility aliases for the current name.

The bulk update request #57200 (forum #426956) has been approved by @nonamethanks.

The bulk update request #57201 (forum #426957) has been rejected by @nonamethanks.

The bulk update request #57202 (forum #426958) has been rejected by @nonamethanks.