fix ic2 crops making any farmland trampleable

[leumasme]

Each IC2 plant can implement a onEntityCollision behavior for when it should be trampled.
By default, crops can be trampled by sprinting over it.
When an IC2 crop is trampled this way, it will set the block below it to dirt.
This is an issue, because it means that even farmland which shouldn't be tramplable (at least via the vanilla falling-onto-farmland mechanic) like Fertilized Dirt can be trampled and will be replaced with normal dirt (instead of the un-tilled fertilized dirt).

This fix just disables the ic2 crop trampling by sprinting for blocks that aren't normal farmland.
If there are any custom farmlands that should be able to be trampled, they can just be specially cased in the fix, but I'm not aware of any.

Could also be implemented by calling onFallenUpon when attempting to trample the crop to try to invoke its trampling-by-falling-onto behavior and avoid any special-casing, but not sure if that's a good idea; who knows what devs are using that method.

After running over some crops containing plants that can be trampled:

Fixes GTNewHorizons/GT-New-Horizons-Modpack#4571 and thus needs a quest update to this quest

( GTNewHorizons/GT-New-Horizons-Modpack#16658 )