Replace ValidatePrototypeId uses with ProtoId or EntProtoId (#38814)

* The easy ones

* For certain values of easy

* Easy test

* Hair

* Fix sandbox violations

* Sort usings

Content.Shared/Gravity/SharedGravitySystem.cs

@@ -4,6 +4,7 @@ using Content.Shared.Movement.Components;
 using Robust.Shared.GameStates;
 using Robust.Shared.Physics;
 using Robust.Shared.Physics.Components;
+using Robust.Shared.Prototypes;
 using Robust.Shared.Serialization;
 using Robust.Shared.Timing;
 
@@ -14,8 +15,7 @@ namespace Content.Shared.Gravity
         [Dependency] protected readonly IGameTiming Timing = default!;
         [Dependency] private readonly AlertsSystem _alerts = default!;
 
-        [ValidatePrototypeId<AlertPrototype>]
-        public const string WeightlessAlert = "Weightless";
+        public static readonly ProtoId<AlertPrototype> WeightlessAlert = "Weightless";
 
         private EntityQuery<GravityComponent> _gravityQuery;