sap_*_preconfigure: handle for nftables

[sean-freeman]

All Ansible Roles should also provide some handling in case an end-user has enabled nftables to replace firewalld (or iptables before it).

"RHEL 7, firewalld is the default firewall solution"
"RHEL 8 and RHEL 9 introduced nftables as the default framework for packet filtering"

"Follow the below step to switch from firewalld to nftables in RHEL 7, RHEL 8 and RHEL 9:"
"Note: Make sure that only one firewall service runs on a RHEL host and disable the other services to prevent the different firewall services from influencing each other."

"To prevent the different firewall-related services (firewalld, nftables, or iptables) from influencing each other, run only one of them on a RHEL host, and disable the other services."

Sources:

• https://access.redhat.com/solutions/7046655
• https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/9/html-single/configuring_firewalls_and_packet_filters/index#when-to-use-firewalld-nftables-or-iptables_using-and-configuring-firewalld

Reference to:
#6 #21 #168 #176 #506