Optional Host Start menu item (#19443)

Marlin/Configuration_adv.h

 //#define HOST_ACTION_COMMANDS
 #if ENABLED(HOST_ACTION_COMMANDS)
   //#define HOST_PROMPT_SUPPORT
+  //#define HOST_START_MENU_ITEM  // Add a menu item that tells the host to start
 #endif
 
 /**

Marlin/src/lcd/menu/menu_main.cpp

   #include "../../feature/password/password.h"
 #endif
 
-#ifdef ACTION_ON_START
+#if ENABLED(HOST_START_MENU_ITEM) && defined(ACTION_ON_START)
   #include "../../feature/host_actions.h"
 #endif
 
     if (TERN0(MACHINE_CAN_PAUSE, printingIsPaused()))
       ACTION_ITEM(MSG_RESUME_PRINT, ui.resume_print);
 
-    #ifdef ACTION_ON_START
+    #if ENABLED(HOST_START_MENU_ITEM) && defined(ACTION_ON_START)
       ACTION_ITEM(MSG_HOST_START_PRINT, host_action_start);
     #endif