games/gzdoom: Update to 3.3.0

Due to too many skipped releases, see
https://github.com/coelckers/gzdoom/releases for release notes between 3.1.0
and 3.3.0.

The patches have since been made redundant by upstream, so they can
safely/happily go away.

MAINTAINER has been updated to my @FreeBSD.org address; this port was still
a work in progress when r445117 to update my other ports was committed.

Tested with: Poudriere (10.4, amd64)
Tested with: Poudriere (stable/11, amd64)
Tested with: Poudriere (head, amd64)
Approved by: lwhsu (ports), me (maintainer)
Differential Revision: https://reviews.freebsd.org/D14864