Partial atmos refactor (#22521)

* Reduce atmos component queries

* Remove method events

* Cache airtight data

* Make MolesArchived nullable

* Fix airtight cache

* only get tile def once

* Immutable mixtures

* firelock queries

* misc

* misc cleanup

* Trim disconnected tiles

* Fix merge issues and bugs

* Why does the PR keep increasing in scope

* debug overlay

* Fix bugs

* Fix test, remove unused events

* Add setmapatmos command

* Fix overlays

* Add map check

* A

* Resolve conflicts with #26102

* Remove some obsolete methods

Content.Shared/Atmos/EntitySystems/SharedGasTileOverlaySystem.cs

@@ -66,7 +66,10 @@ namespace Content.Shared.Atmos.EntitySystems
         [Serializable, NetSerializable]
         public readonly struct GasOverlayData : IEquatable<GasOverlayData>
         {
+            [ViewVariables]
             public readonly byte FireState;
+
+            [ViewVariables]
             public readonly byte[] Opacity;
 
             // TODO change fire color based on temps