Make mechanism behaviors properly update, fix eating and drinking (#2472)

* Make mechanisms properly update and fix eating and drinking

* Remove outdated component ignores

* Fix nullable error

* Fix mechanism behavior events

* Remove unnecessary code

Content.Shared/GameObjects/Components/Nutrition/SharedStomachComponent.cs

@@ -1,12 +0,0 @@
-using Robust.Shared.GameObjects;
-
-namespace Content.Shared.GameObjects.Components.Nutrition
-{
-    /// <summary>
-    /// Shared class for stomach components
-    /// </summary>
-    public class SharedStomachComponent : Component
-    {
-        public override string Name => "Stomach";
-    }
-}