firewall: T5814: Retain legacy 'accept' behaviour and re-order migration

Pre-1.4 firewall 'accept' action acted as a 'return'. This change ensures the migrated rules meet the expected behaviour.

This commit also re-orders migrated in/out/local jumps ordered by direction instead of interface.

(cherry picked from commit dc542f109460bca6453d1eeba9fe829aea38bb33)