Since we introduced network events, we don't catch OVS_DROP_LAST_ACTION as drop anymore. 

Dropped bytes / packets / cause and reason needs to be reintroduced in drop fields to keep metrics and graphs.

This affects the user experience since we need to switch to network events to see the drop.

https://github.com/netobserv/netobserv.github.io/pull/6#discussion_r1939152634

Note: no need to update the Topology decorations related to drops, as it will be covered by NETOBSERV-2329