net/guacamole-server: Fix disabling KUBERNETES/SSH

Both options need --with-pango and --with-terminal configure args. The
<opt>_CONFIGURE_WITH helper also adds --without-* args for disabled
options, so it can't be used here, as this will lead to conflicting
configure args.

Solve this by explicitly handling these after including
bsd.port.options.mk. Also fix pkg-plist when both KUBERNETES and SSH are
disabled.

PR: 277976
Approved by: ultima (maintainer)