Replace obsolete EntityWhitelist IsValid usages (#28465)

* Replace obsolete whitelist is valid with whitelist system

* Consistency

* Fix logic

* Bork

* I figured out how to get whitelists on the client lol

* test fail

* woops

* HELP ME FUNCTIONS

* Fix errors

* simplify

---------

Co-authored-by: plykiya <plykiya@protonmail.com>

Content.Shared/Weapons/Ranged/Systems/SharedGunSystem.cs

@@ -21,6 +21,7 @@ using Content.Shared.Weapons.Melee;
 using Content.Shared.Weapons.Melee.Events;
 using Content.Shared.Weapons.Ranged.Components;
 using Content.Shared.Weapons.Ranged.Events;
+using Content.Shared.Whitelist;
 using Robust.Shared.Audio;
 using Robust.Shared.Audio.Systems;
 using Robust.Shared.Containers;
@@ -63,6 +64,7 @@ public abstract partial class SharedGunSystem : EntitySystem
     [Dependency] protected readonly TagSystem TagSystem = default!;
     [Dependency] protected readonly ThrowingSystem ThrowingSystem = default!;
     [Dependency] private   readonly UseDelaySystem _useDelay = default!;
+    [Dependency] private readonly EntityWhitelistSystem _whitelistSystem = default!;
 
     private const float InteractNextFire = 0.3f;
     private const double SafetyNextFire = 0.5;