Replace SharedStatusEffectsSystem with StatusEffectsSystem

Updated references from SharedStatusEffectsSystem to StatusEffectsSystem in spell and magic weakness systems to use the correct status effects system implementation.

Content.Shared/_CP14/MagicWeakness/CP14SharedMagicWeaknessSystem.cs

@@ -9,7 +9,7 @@ namespace Content.Shared._CP14.MagicWeakness;
 
 public abstract class CP14SharedMagicWeaknessSystem : EntitySystem
 {
-    [Dependency] private readonly SharedStatusEffectsSystem _statusEffects = default!;
+    [Dependency] private readonly StatusEffectsSystem _statusEffects = default!;
     [Dependency] private readonly DamageableSystem _damageable = default!;
     [Dependency] private readonly SharedPopupSystem _popup = default!;