fix(apple): Fix ResourceList bug showing cached Resources from last session (#5645)

On macOS and iOS, the TunnelManager instance stays active across
sessions. This contains a Resource cache used to fetch Resources from
the tunnel process.

This cache wasn't cleared across sessions, so the first time the
callback fired the Resources shown were the ones from the last session.
After `1s`, they were correctly set to the current session's Resources
due to the `beginUpdatingResources` timer.

We were already clearing the stored Hash of the Resource cache on
disconnect, but not the Resource cache itself. This patch fixes that bug
by re-initializing the cache when the tunnel session is `disconnected`.

swift/apple/FirezoneKit/Sources/FirezoneKit/Managers/TunnelManager.swift

@@ -248,6 +248,7 @@ class TunnelManager {
           if session.status == .disconnected {
             // Reset resource list on disconnect
             resourceListHash = Data()
+            resourcesListCache = Data()
           }
 
           await statusChangeHandler?(session.status)