Add preDelete callback and add the grantOnDelete option to control when the granted item is created to GrantItemRuleElement

[In3luki]

This adds a new option for GrantItemRuleElements called grantOnDelete that controls whether the granted item should be created when the parent item is deleted instead.

Example rule element for Effect: Rage that creates the Effect: Rage Temporary Hit Points Immunity when the rage effect expires or is deleted:

{
  "key": "GrantItem",
  "uuid": "Compendium.pf2e.feat-effects.Item.MaepXeSHiMoWDm7u",
  "allowDuplicate": false,
  "grantOnDelete": true
}

[In3luki]

I've removed the onExpire callback as the derived nature of effect expiry makes it difficult to track if the item should be created.
With the setting to automatically remove expired effects it should still work for the use case.