net-mgmt/icingaweb2*: Fix breakage after update of icinga-php-*

In 2a12b7cab556 and f95fbf3e2406 net-mgmt/icinga-php-library and
net-mgmt/icinga-php-thirdparty were set to IGNORE_WITH_PHP=81
that caused all of the packages that depend on them and still have a
php81 falvor to fail breaking package building in general.

Mark all of the ports depending on them as IGNORE_WITH_PHP=81

Reported by: antoine
Pointy hat to: flo