[Quest API] Add GetEnvironmentalDamageName() to Perl/Lua. (#1964)

- Add EQ::constants::GetEnvironmentalDamageMap() and EQ::constants::GetEnvironmentalDamageName().
- Add quest::getenvironmentaldamagename(damage_type) to Perl.
- Add eq.get_environmental_damage_name(damage_type) to Lua.
- Cleanup GM messages for avoiding environmental damage.

zone/questmgr.cpp

@@ -3698,3 +3698,8 @@ const SPDat_Spell_Struct* QuestManager::getspell(uint32 spell_id) {
     }
     return nullptr;
 }
+
+std::string QuestManager::getenvironmentaldamagename(uint8 damage_type) {
+	std::string environmental_damage_name = EQ::constants::GetEnvironmentalDamageName(damage_type);
+	return environmental_damage_name;
+}