Icon smoothing for asteroid rocks (#8058)

Co-authored-by: Tomeno <tomeno@lulzsec.co.uk>

Resources/Prototypes/Entities/Mobs/NPCs/animals.yml

@@ -76,9 +76,6 @@
   - type: MovementSpeedModifier
     baseWalkSpeed : 7
     baseSprintSpeed : 7
-  - type: RandomAppearance
-    # relic
-    key: enum.AsteroidRockVisuals.State
   - type: Sprite
     drawdepth: Mobs
     layers:
@@ -414,7 +411,6 @@
       normal: crab
       crit: dead
       dead: dead
-    - type: AsteroidRockVisualizer
   - type: Butcherable
     spawned:
     - id: FoodMeatCrab

Resources/Prototypes/Entities/Structures/Walls/asteroid.yml

@@ -4,8 +4,6 @@
   name: asteroid rock
   description: An asteroid.
   components:
-  - type: RandomAppearance
-    key: enum.AsteroidRockVisuals.State
   - type: Mineable
     ores:
     - id: SteelOre1
@@ -28,7 +26,7 @@
       orGroup: Asteroid
   - type: Sprite
     sprite: Structures/Walls/asteroid_rock.rsi
-    state: 0
+    state: full
   - type: Damageable
     damageContainer: Inorganic
   - type: Destructible
@@ -43,9 +41,6 @@
     sizeX: 32
     sizeY: 32
   - type: Airtight
-  - type: Appearance
-    visuals:
-    - type: AsteroidRockVisualizer
   - type: Fixtures
     fixtures:
     - shape:
@@ -59,3 +54,6 @@
       - Impassable
       - VaultImpassable
       - SmallImpassable
+  - type: IconSmooth
+    key: rock
+    base: rock_