Support weighted tile variantize (#18940)

* Support weighted tile variantize

* Remove unused using

* Use an array

Content.Shared/Maps/ContentTileDefinition.cs

@@ -1,5 +1,4 @@
 using Content.Shared.Atmos;
-using JetBrains.Annotations;
 using Robust.Shared.Audio;
 using Robust.Shared.Map;
 using Robust.Shared.Prototypes;
@@ -37,7 +36,7 @@ namespace Content.Shared.Maps
         public string BaseTurf { get; } = string.Empty;
 
         [DataField("canCrowbar")] public bool CanCrowbar { get; private set; }
-		
+
         /// <summary>
         /// Whether this tile can be pried by an advanced prying tool if not pryable otherwise.
         /// </summary>
@@ -62,7 +61,7 @@ namespace Content.Shared.Maps
         /// <summary>
         /// This controls what variants the `variantize` command is allowed to use.
         /// </summary>
-        [DataField("placementVariants")] public byte[] PlacementVariants { get; set; } = new byte[1] { 0 };
+        [DataField("placementVariants")] public float[] PlacementVariants { get; set; } = new [] { 1f };
 
         [DataField("thermalConductivity")] public float ThermalConductivity = 0.04f;