Variadic IS_BATTLER_OF_TYPE and GetBattlerTypes

[mrgriffin]

@AlexOn1ine wanted something like !IS_BATTLER_ANY_TYPE(gBattlerAttacker, TYPE_ROCK, TYPE_GROUND, TYPE_STEEL).

In addition to that I added GetBattlerTypes which computes all the types at the same time, to improve the performance of any code which checks multiple types at once, and updated all GetBattlerTypes to use the new function.

So that downstream code continues to work:

• GetBattlerType is implemented in terms of GetBattlerTypes.
• IS_BATTLER_OF_TYPE is implemented in terms of IS_BATTLER_ANY_TYPE.

Things to note in the release changelog:

• IS_BATTLER_ANY_TYPE should be preferred to IS_BATTLER_OF_TYPE whenever more than one type is being checked.
• GetBattlerTypes should be preferred to GetBattlerType whenever more than one type is being checked.

[mrgriffin]

Oh for God's sake, I forgot agbcc still exists on master 🤦

[mrgriffin]

Rebased onto upcoming at Alex's request. I didn't check for any new IS_BATTLER_OF_TYPE to combine.