Adds in-battle effect of Pickup, adds Harvest and Pickup tests

[PhallenTree]

• Adds the following missing effects of Pickup:

Generation V-VIII
At the end of the turn in which another Pokémon used a one-time-use item (including throwing an item with Fling or using Natural Gift), a Pokémon with Pickup will collect the item if they are not holding anything. If more than one Pokémon has Pickup or Harvest, the faster Pokémon will restore an item first. If multiple items can be collected, the Pokémon will collect the item most recently consumed.

A single Pokémon's Pickup will not activate more than once per turn.

Pickup cannot collect an item if the Pokémon that consumed the item is no longer on the field at the end of the turn, or if the item has already been recovered (such as with Recycle, another Pokémon's Pickup, or Harvest). Pickup cannot collect an item that a Pokémon consumed before switching out, even if it switched back in again before the end of the turn. Pickup cannot collect items that have been destroyed with Incinerate, eaten with Bug Bite or Pluck, or knocked off with Knock Off. A popped Air Balloon cannot be collected.

A Pokémon may only have one consumed item at a time; if a Pokémon consumes an item, then obtains another item and consumes it, the original consumed item cannot be collected, even if the second item is collected or restored then swapped away. If the Pokémon obtains another item after consuming an item, Pickup can still collect the old item as long as the Pokémon does not consume the new one.

Generation IX
A Pokémon with Pickup recovers its consumed held item at the end of the turn in a battle against a wild Pokémon.

• Adds Harvest and Pickup tests. Modified G-Max Replenish test due to Munchlax picking up an item before G-Max Replenish is used.

• Fixes RandomUniformExcept not being inclusive on the higher boundary.

Issue(s) that this PR fixes

Fixes #3355

Discord contact info

PhallenTree

[AlexOn1ine]

Sorry, a couple minor test things.

[AlexOn1ine]

Looks great, thx!

One minor thing. Usually new features go to upcoming and master is for bugfixes but that's fine. Just a heads up for the future.