Burning mobs can still destroy powder snow when gamerule mobgriefing is disabled

Burning mobs can still destroy powder snow when gamerule mobgriefing is disabled. May be intended, relates to MC-221702.

How to reproduce:

1. Place powder snow

2. /gamerule mobGriefing false

3. Set a mob on fire
4. Push the mob into the powder snow
   It still destroys the powder snow.