Unifying damage type and take_damage parameters.

[MistakeNot4892]

Description of changes

• Unified damtype and damage_type as atom_damage_type.`
• Unified take_damage() overrides/params/param order in a single signature on /atom.
• Renames non-atom take_damage() procs to use distinct names.

Why and what will this PR improve

Organizes a bunch of disparate procs in a consistent way. Makes dusting off and finishing #3418 easier and will make reviewing less painful.

Authorship

Myself.

Changelog

Nothing player-facing.