[MC-134408] Breaking 8-level snow layer with Silk Touch drops snow block

Note to the devs

If ~~MC-119559~~ is considered valid and gets fixed, then the behavior described in this report here might be intended and the other inconsistencies listed below could be considered bugs as well.

The bug

Breaking a 8-level snow layer block with a silk touch shovel drops a snow block instead of 8 snow layers.

This is rather confusing because 8-level snow layers and snow blocks are pretty different

	Snow layer	Snow block
Is destroyed by water
Amount of dropped snowballs	8	4
Has solid faces