Fix damage modifier inconsistencies

Affect the falling stalactite damage type where the
reduction is not applied like in Vanilla.
Additionally fix the "is_freezing" damage type tag.

paper-server/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java

@@ -1222,11 +1222,11 @@ public class CraftEventFactory {
         Map<DamageModifier, Function<? super Double, Double>> modifierFunctions = new EnumMap<>(DamageModifier.class);
         modifiers.put(DamageModifier.BASE, rawDamage);
         modifierFunctions.put(DamageModifier.BASE, CraftEventFactory.ZERO);
-        if (source.is(DamageTypes.FREEZE)) {
+        if (source.is(DamageTypeTags.IS_FREEZING)) { // Paper
             modifiers.put(DamageModifier.FREEZING, freezingModifier);
             modifierFunctions.put(DamageModifier.FREEZING, freezing);
         }
-        if (source.is(DamageTypes.FALLING_BLOCK) || source.is(DamageTypes.FALLING_ANVIL)) {
+        if (source.is(DamageTypeTags.DAMAGES_HELMET)) { // Paper
             modifiers.put(DamageModifier.HARD_HAT, hardHatModifier);
             modifierFunctions.put(DamageModifier.HARD_HAT, hardHat);
         }