www/baculum-common: Add php 8 support

As per the release notes available in their git repository from here:
https://gitlab.bacula.org/bacula-community-edition/bacula-community/-/blob/Branch-11.0/gui/baculum/ReleaseNotes

this ports supports php 8 from the current version in the tree.

Approved by:	portmgr (blanket infrastructure)
Sponsored by:	Bounce Experts

www/baculum-common/Makefile

@@ -13,7 +13,6 @@ LICENSE=	AGPLv3
 LICENSE_FILE=	${WRKSRC}/${PORTNAME}/LICENSE
 
 USES+=		php
-PHP_VER=	74
 
 BCL_VARDIR?=	/var
 BCL_CACHEDIR?=	${BCL_VARDIR}/cache/${PORTNAME}