[Quest API] Add option to Ignore Mods to CalcEXP (#2704)

# Perl
- Add `$client->CalcEXP(consider_level, ignore_modifiers)`.

# Lua
- Add `client:CalcEXP(consider_level)`.
- Add `client:CalcEXP(consider_level, ignore_modifiers)`.

# Notes
- Allows operators to calculate experience based on consider level as well as ignore modifiers to get a baseline of experience that should be expected when killing a mob.

zone/lua_client.h

@@ -457,6 +457,8 @@ public:
 	luabind::object GetAugmentIDsBySlotID(lua_State* L, int16 slot_id);
 	bool IsEXPEnabled();
 	void SetEXPEnabled(bool is_exp_enabled);
+	uint64 CalcEXP(uint8 consider_level);
+	uint64 CalcEXP(uint8 consider_level, bool ignore_modifiers);
 
 	void ApplySpell(int spell_id);
 	void ApplySpell(int spell_id, int duration);