Imply combat helmets

BUR #30964 has been approved by @nonamethanks.

create implication altyn_helmet -> combat_helmet
create implication adrian_helmet -> combat_helmet
remove implication pickelhaube -> helmet
create implication pickelhaube -> combat_helmet

Some distinct combat helmets in real life.

Requested a change to Pickelhaube implication hierarchy, because it was originally designed for combat. Despite many combat helmets are now also used for ceremonial purposes.

We have combat helmet to distinguish it from motorcycle helmet & co, so it's fine if they're not "used" as military helmets nowadays, the tag is just for the aesthetic, not the usage.

The bulk update request #30964 (forum #305303) has been approved by @nonamethanks.