Reduce water + fuel tank prices (#15692)

There's a higher requirement for mopping so dropped the price. Need space cleaner first before we should consider dropping further IMO.

Resources/Prototypes/Catalog/Cargo/cargo_materials.yml

@@ -74,7 +74,7 @@
     sprite: Structures/Storage/tanks.rsi
     state: fueltank
   product: WeldingFuelTankFull
-  cost: 2000
+  cost: 1500
   category: Materials
   group: market
 
@@ -84,6 +84,6 @@
     sprite: Structures/Storage/tanks.rsi
     state: watertank
   product: WaterTankFull
-  cost: 2000
+  cost: 1000
   category: Materials
   group: market

Resources/Prototypes/Entities/Structures/Storage/Tanks/tanks.yml

@@ -6,7 +6,7 @@
   suffix: Empty
   components:
   - type: StaticPrice
-    price: 1200
+    price: 750
   - type: Sprite
     sprite: Structures/Storage/tanks.rsi
     state: fueltank
@@ -27,8 +27,6 @@
   parent: WeldingFuelTank
   suffix: Full
   components:
-  - type: StaticPrice
-    price: 1200
   - type: SolutionContainerManager
     solutions:
       tank:
@@ -42,7 +40,7 @@
   suffix: Full
   components:
   - type: StaticPrice
-    price: 3000
+    price: 2500
   - type: Sprite
     sprite: Structures/Storage/tanks.rsi
     state: highfueltank
@@ -65,7 +63,7 @@
   suffix: Empty
   components:
   - type: StaticPrice
-    price: 1200
+    price: 500
   - type: Sprite
     sprite: Structures/Storage/tanks.rsi
     state: watertank
@@ -75,8 +73,6 @@
   id: WaterTankFull
   suffix: Full
   components:
-  - type: StaticPrice
-    price: 1200
   - type: SolutionContainerManager
     solutions:
       tank: