Use nftables instead of the deprecated iptables

[NeroReflex]

As per title: use iptables-nft instead of the deprecated iptables.

See https://gitlab.archlinux.org/archlinux/packaging/packages/iptables/-/issues/1 for more details.

The deprecated iptables is not completely suitable for docker or podman as stated in that page.

The reason this is not in PACKAGES is the following error will appear:

error: unresolvable package conflicts detected
:: iptables-nft-1:1.8.10-1 and iptables-1:1.8.10-1 are in conflict. Remove iptables? [y/N] 
:: iptables-nft-1:1.8.10-1 and iptables-1:1.8.10-1 are in conflict
error: failed to prepare transaction (conflicting dependencies)

[pastaq]

LGTM

[NeroReflex]

@pastaq I spotted a problem: it forces the pacman database to be regenerated. That has to be moved to solve this, or the install must be moved early in the build process....

[pastaq]

The reason this is not in PACKAGES is the following error will appear:

error: unresolvable package conflicts detected
:: iptables-nft-1:1.8.10-1 and iptables-1:1.8.10-1 are in conflict. Remove iptables? [y/N] 
:: iptables-nft-1:1.8.10-1 and iptables-1:1.8.10-1 are in conflict
error: failed to prepare transaction (conflicting dependencies)

The base meta package has iptables as a dependency and it doesn't reflect iptables-nft as a suitable replacement for some reason.