A few entities still have missing MakeSnowCoveredPristine or MakeSnowCovered calls

Update 680157 addressed many entities not calling one or the other, but there's still a few that have this issue, from doing a quick search with MakeSnowCovered across all files.

No MakeSnowCoveredPristine call:

• balatro_machine

No MakeSnowCovered call:

• mighty_gym
• quagmire_evergreen
• quagmire_mealingstone
• quagmire_safe
• quagmire_salt_rack
• quagmire_sugarwoodtree

I know the quagmire ones aren't really relevant (and might instead need to remove the pristine call instead? unsure, haven't tested), but I thought I'd include them just in case.