Update postgres paths

Some linux distros (e.g. Gentoo) have postgres installed in /usr/lib64.
Update apparmour profile to allow execution of postgres in /usr/lib64
to handle apparmor denial like this:
audit: type=1400 audit(1639935939.256:552): apparmor="DENIED" operation="exec" profile="postgresql_akonadi" name="/usr/lib64/postgresql-14/bin/postgres" pid=6176 comm="sh" requested_mask="x" denied_mask="x" fsuid=1000 ouid=0