Add records in format ${ansible_host} ${FQDN} ${short} from inventory to /etc/hosts

Config example:

pin_hosts: yes

Inventory example:

node1.site.local ansible_host=10.2.1.5
node2.site.local ansible_host=10.2.1.6
node3.site.local ansible_host=10.2.1.7

Result /etc/hosts:

10.2.1.5 node1.site.local node1
10.2.1.6 node2.site.local node2
10.2.1.7 node3.site.local node3