Consolidate and shrink down the re-used strings in logs (#4907)

* Consolidate and shrink down the re-used strings in GPS

* Condense all the things

---------

Co-authored-by: GUVWAF <thijs@havinga.eu>

src/gps/GPS.h

@@ -156,6 +156,8 @@ class GPS : private concurrency::OSThread
     static const uint8_t _message_CAS_CFG_NAVX_CONF[];
     static const uint8_t _message_CAS_CFG_RATE_1HZ[];
 
+    const char *ACK_SUCCESS_MESSAGE = "Get ack success!\n";
+
     meshtastic_Position p = meshtastic_Position_init_default;
 
     /** This is normally bound to config.position.gps_en_gpio but some rare boards (like heltec tracker) need more advanced