MC1235 cultivator IC doesn't respect WorldGuard regions

CRAFTBOOK-2818 - Reported by andy.armanini

I'm unsure if this is a bug or an unimplemented feature. Are MC1235 ICs supposed to respect WG regions? It would rely on who placed the sign I guess?

To reproduce: regular user with appropriate permissions places an MC1235 inside his region, sets radius to exceed his region, grass blocks in nearby regions are affected.

I have a main world border region in which the player has no owner/membership, the player's region is inside this main region

```yaml|title=regions extract
mureybet-wb:
type: cuboid
min: {x: -352.0, y: 0.0, z: -1376.0}
max: {x: 864.0, y: 255.0, z: 352.0}
priority: -1
flags: {vehicle-place: allow, pvp: deny, vehicle-destroy: allow, use: allow, potion-splash: deny, enderdragon-block-damage: deny, exit: deny, farewell: You are leaving the city limits., chest-access: allow, entity-item-frame-destroy: deny, mob-damage: deny, entity-painting-destroy: deny, snow-fall: deny}
owners: {}
members: {}

kb+0015-0107:
type: cuboid
min: {x: -43.0, y: 0.0, z: -126.0}
max: {x: 5.0, y: 255.0, z: -107.0}
priority: 0
flags: {}
owners:
players: [the player`s name is here removed for privacy reasons]
members: {}
```

spigot 1211
craftbook 3403
worldguard 1264