Default on/off for Power Loss Recovery (#17051)

Marlin/src/inc/Conditionals_adv.h

@@ -65,6 +65,10 @@
   #define NUM_Z_STEPPER_DRIVERS 1
 #endif
 
+#ifndef PLR_ENABLED_DEFAULT
+  #define PLR_ENABLED_DEFAULT true
+#endif
+
 #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
   #undef Z_STEPPER_ALIGN_AMP
 #endif

Marlin/src/module/configuration_store.cpp

@@ -930,7 +930,7 @@ void MarlinSettings::postprocess() {
         #if ENABLED(POWER_LOSS_RECOVERY)
           recovery.enabled
         #else
-          true
+          PLR_ENABLED_DEFAULT
         #endif
       ;
       EEPROM_WRITE(recovery_enabled);
@@ -2670,7 +2670,7 @@ void MarlinSettings::reset() {
   //
 
   #if ENABLED(POWER_LOSS_RECOVERY)
-    recovery.enable(true);
+    recovery.enable(PLR_ENABLED_DEFAULT);
   #endif
 
   //