Fix Punching Glove moves making contact (smogon#614)

https://www.smogon.com/forums/posts/10061460

If we compare the results with a Melmetal using Double Iron Bash on a Fluffy Bewear with and without the Punching Glove item:

Before:
`0 Atk Iron Fist Melmetal Double Iron Bash (2 hits) vs. 0 HP / 0 Def Fluffy Bewear: 126-150 (33 - 39.3%) -- approx. 99.9% chance to 3HKO`
`0 Atk Punching Glove Iron Fist Melmetal Double Iron Bash (2 hits) vs. 0 HP / 0 Def Fluffy Bewear: 140-166 (36.7 - 43.5%) -- approx. 3HKO`

140 / 126 = 1.111 ~ 1.1
166 / 150 = 1.107 ~ 1.1

After:
`0 Atk Iron Fist Melmetal Double Iron Bash (2 hits) vs. 0 HP / 0 Def Fluffy Bewear: 126-150 (33 - 39.3%) -- approx. 99.9% chance to 3HKO`
`0 Atk Punching Glove Iron Fist Melmetal Double Iron Bash (2 hits) vs. 0 HP / 0 Def Bewear: 282-332 (74 - 87.1%) -- approx. 2HKO`

282 / 126 = 2.238 ~ 2.2
332 / 150 = 2.213 ~ 2.2

2.2 = 1.1 / 0.5 (the debuff associated with Fluffy)

calc/src/mechanics/gen789.ts

@@ -124,6 +124,11 @@ export function calculateSMSSSV(
     return result;
   }
 
+  if (move.flags.punch && attacker.hasItem('Punching Glove')) {
+    desc.attackerItem = attacker.item;
+    move.flags.contact = 0;
+  }
+
   const breaksProtect = move.breaksProtect || move.isZ || attacker.isDynamaxed ||
   (attacker.hasAbility('Unseen Fist') && move.flags.contact);
 
@@ -1152,7 +1157,6 @@ export function calculateBPModsSMSSSV(
 
   if (attacker.hasItem('Punching Glove') && move.flags.punch) {
     bpMods.push(4506);
-    desc.attackerItem = attacker.item;
   }
 
   if (gen.num <= 8 && defender.hasAbility('Heatproof') && move.hasType('Fire')) {