Use static classes for job timers (#9938)

Marlin/src/Marlin.cpp

@@ -730,11 +730,7 @@ void setup() {
   // 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);
@@ -747,6 +743,8 @@ void setup() {
 
   thermalManager.init();    // Initialize temperature loop
 
+  print_job_timer.init();   // Initial setup of print job timer
+
   stepper.init();    // Initialize stepper, this enables interrupts!
 
   #if HAS_SERVOS