Makes asteroids low yield, adds normal yield variant for mining (#8701)

* Adds low yield mining loot table

* adds low yield variant of asteroids

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

@@ -2,14 +2,14 @@
   id: AsteroidRock
   parent: BaseStructure
   name: asteroid rock
-  description: An asteroid.
+  description: A rocky asteroid.
   components:
   - type: Gatherable
     whitelist:
       tags:
         - Pickaxe
     loot:
-      Pickaxe: MiningLootTable
+      Pickaxe: MiningLootTableLowYield
   - type: Sprite
     sprite: Structures/Walls/asteroid_rock.rsi
     state: full
@@ -41,3 +41,16 @@
   - type: IconSmooth
     key: walls
     base: rock_
+
+- type: entity
+  id: AsteroidRockMining
+  parent: BaseStructure
+  name: asteroid rock
+  description: An asteroid.
+  components:
+  - type: Gatherable
+    whitelist:
+      tags:
+        - Pickaxe
+    loot:
+      Pickaxe: MiningLootTable

Resources/Prototypes/LootTables/mining_loot_table.yml

@@ -18,4 +18,26 @@
     orGroup: Asteroid
   - id: UraniumOre1
     prob: 0.025
-    orGroup: Asteroid
+    orGroup: Asteroid
+    
+- type: entityLootTable
+  id: MiningLootTableLowYield
+  entries:
+  - id: SteelOre1
+    prob: 0.05
+    orGroup: Asteroid
+  - id: GoldOre1
+    prob: 0.01
+    orGroup: Asteroid
+  - id: SpaceQuartz1
+    prob: 0.05
+    orGroup: Asteroid
+  - id: PlasmaOre1
+    prob: 0.025
+    orGroup: Asteroid
+  - id: SilverOre1
+    prob: 0.02
+    orGroup: Asteroid
+  - id: UraniumOre1
+    prob: 0.02
+    orGroup: Asteroid