Establish MQTT connection only from MQTT::runOnce (#6057)

Co-authored-by: Ben Meadors <benmmeadors@gmail.com>

src/mqtt/MQTT.h

@@ -47,10 +47,6 @@ class MQTT : private concurrency::OSThread
      */
     void onSend(const meshtastic_MeshPacket &mp_encrypted, const meshtastic_MeshPacket &mp_decoded, ChannelIndex chIndex);
 
-    /** Attempt to connect to server if necessary
-     */
-    void reconnect();
-
     bool isConnectedDirectly();
 
     bool publish(const char *topic, const char *payload, bool retained);
@@ -115,6 +111,10 @@ class MQTT : private concurrency::OSThread
      */
     bool wantsLink() const;
 
+    /** Attempt to connect to server if necessary
+     */
+    void reconnect();
+
     /** Tell the server what subscriptions we want (based on channels.downlink_enabled)
      */
     void sendSubscriptions();