Device network as ecs (#4205)

* Work on DeviceNetworkSystem

* Implement device networking as ecs
Remove mailing unit code for now
Remove device network metadata

* Implement integration tests for device networking

* Remove manual updating DeviceNetworkSystem and use WaitRunTicks

* Fix wrong component name in ignored components

* Apply suggestions from code review

Co-authored-by: mirrorcult <notzombiedude@gmail.com>

* Rename NetworkUtils to DeviceNetworkConstants
Change connection type constants to enum
Remove create function from network payload class

* Change broken nodegroup check in wirenet to grid check

* Change ComponentManager to entity manager in DeviceNetworkSystem

* Fix smaller mistakes

* Wtf random test fail pls run them again smh

* Fix DataField in DeviceNetworkComponent

* Fix yaml in DeviceNetworkTest

* Fix DeviceNetworkComponent DeviceNetId property

Co-authored-by: Julian Giebel <j.giebel@netrocks.info>
Co-authored-by: mirrorcult <notzombiedude@gmail.com>

Content.Server/DeviceNetwork/NetworkPayload.cs

@@ -0,0 +1,28 @@
+using Robust.Shared.Log;
+using System.Collections.Generic;
+using Robust.Shared.Utility;
+using System.Diagnostics.CodeAnalysis;
+
+namespace Content.Server.DeviceNetwork
+{
+    public class NetworkPayload : Dictionary<string, object>
+    {
+        /// <summary>
+        /// Tries to get a value from the payload and checks if that value is of type  T.
+        /// </summary>
+        /// <typeparam name="T">The type that should be casted to</typeparam>
+        /// <returns>Whether the value was present in the payload and of the required type</returns>
+        public bool TryGetValue<T>(string key, [NotNullWhen(true)] out T? value)
+        {
+            if (this.TryCastValue(key, out T? result))
+            {
+                value = result;
+                return true;
+            }
+
+            value = default;
+            return false;
+        }
+    }
+
+}