Add more arguments to the "rewards" section of advancements.

A simple addition to Datapack Advancement syntax, the Reward Function argument specifically.
Example:

"rewards": {
    "function": {
        "functions": [
            "namespace:function_1",
            "namespace:function_2"
        ],
        "input": [
            {"1": "entity_uuid"},
            {"2": "entity_type"},
            {"3": "block_location"},
            {"4": "block_type"}
        ]
    }
}

The "functions" array is self explanatory. Every function listed is run at once, in the order of the list.
The "input" array works exactly like including that same JSON after a function in the /function command, except the second input refers to an argument in the rest of the advancement.
"entity_uuid" would provide target entity's UUID as a string, so if the trigger is "minecraft:player_hurt_entity", and the player hurts a pig, it would provide the UUID of the pig.

"entity_type" would provide the type of the target entity as a string, along with the namespace, so if the trigger is "minecraft:player_hurt_entity", and the player hurts a pig, it would provide "minecraft:pig".

"block_location" would provide the position of the target block as an integer,  so if the trigger is "minecraft:placed_block", and the player places a campfire, it would provide the position of the campfire.

"block_type" would provide the type of the target block as a string, along with the namespace, so if the trigger is "minecraft:placed_block", and the player places a campfire, it would provide "minecraft:campfire".