Add BlockDropResourcesEvent and EntityBreakBlockEvent

[qixils]

Expands upon #4989 (cc @Machine-Maker) by:

• Creating a general-purpose BlockDropResourcesEvent for all resources (items) dropped by a block (which, unlike BlockDropItemEvent, works for more than just players)
• Making the previous BlockBreakBlockEvent extend this new event
• Creating a new EntityBreakBlockEvent for item drops caused by an entity

Use cases:

• adding new item drops to blocks (making all leaves drop apples, for instance)
• modifying the drops of crops from farming villagers
• a lot more, probably

note: blocks broken by players seem to not exist at time of event calling (i blame all the weirdly player-specific block-related events in bukkit), will investigate soon
i identified the logic that leads to this behavior but it unfortunately doesn't seem workaround-able so i opted to just include a snapshot of the blockstate inside the event instead which is Good Enough

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[qixils]

Rebased (and fixed up) for 1.18.2