Init print_job_timer in setup() instead of "early" (#9937)

Marlin/src/Marlin.cpp

   // Load data from EEPROM if available (or use defaults)
   // This also updates variables in the planner, elsewhere
   (void)settings.load();
-
+  
+  #if ENABLED(PRINTCOUNTER)
+    print_job_timer.init();
+  #endif  
+  
   #if HAS_M206_COMMAND
     // Initialize current position based on home_offset
     COPY(current_position, home_offset);

Marlin/src/libs/stopwatch.h

     Stopwatch();
 
     /**
+     * @brief Initialize the stopwatch
+     */
+    inline void init() {}
+
+    /**
      * @brief Stops the stopwatch
      * @details Stops the running timer, it will silently ignore the request if
      * no timer is currently running.

Marlin/src/module/printcounter.cpp

 
 #include "../Marlin.h"
 
-PrintCounter::PrintCounter(): super() {
-  this->loadStats();
-}
-
 millis_t PrintCounter::deltaDuration() {
   #if ENABLED(DEBUG_PRINTCOUNTER)
     PrintCounter::debug(PSTR("deltaDuration"));

Marlin/src/module/printcounter.h

     millis_t deltaDuration();
 
   public:
+
     /**
-     * @brief Class constructor
+     * @brief Initialize the print counter
      */
-    PrintCounter();
+    inline void init() {
+      super::init();
+      this->loadStats();
+    }
 
     /**
      * @brief Checks if Print Statistics has been loaded