Make all prototype types partial (#21374)

Content.Shared/Traits/TraitPrototype.cs

@@ -1,7 +1,8 @@
 using Content.Shared.Whitelist;
 using Robust.Shared.Prototypes;
 using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype;
-using static Robust.Shared.Prototypes.EntityPrototype; // don't worry about it
+
+// don't worry about it
 
 namespace Content.Shared.Traits
 {
@@ -9,7 +10,7 @@ namespace Content.Shared.Traits
     ///     Describes a trait.
     /// </summary>
     [Prototype("trait")]
-    public sealed class TraitPrototype : IPrototype
+    public sealed partial class TraitPrototype : IPrototype
     {
         [ViewVariables]
         [IdDataField]