Removes butterflies from the plasma flower MOD core, reduces the amount of particles spawned (#95623)

## About The Pull Request

The plasma flower MOD core from the Garden of Eden ruin no longer spawns
butterflies as you run around, and the amount of pollen particles it
creates on the user has been quartered.

## Why It's Good For The Game

Butterflies are incredibly annoying to deal with and can block your own
swings in combat, and don't serve a purpose beyond creating a ton of
visual clutter. Same applies to the pollen particles, there's so many
you can barely see your own sprite underneath. Quartering them still
leaves plenty there to look nice.

## Changelog
🆑
del: Plasma flower MOD core no longer spawns butterflies around the user
qol: Plasma flower MOD core's pollen visual now spawns less particles
/🆑

code/game/objects/effects/particles/plant.dm

@@ -17,6 +17,10 @@
 	rotation = 30
 	spin = generator(GEN_NUM, -20, 20)
 
+// Subtype for the lavaland flower MODcore
+/particles/pollen/modsuit
+	spawning = 1
+
 // Subtype for mushroom spores specific to mushfolk/mushroom people
 /particles/pollen/mushroom
 	icon = 'icons/effects/particles/pollen.dmi'