🩹 Fixup USE_Z_MIN conditions

Do not define USE_Z_MIN when using USE_PROBE_FOR_Z_HOMING and not Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN.
HAS_Z_MIN_STATE should still be defined in this case.

Author: The-EG

Marlin/src/inc/Conditionals_post.h

@@ -1992,13 +1992,13 @@
   #define HAS_Y_STATE 1
 #endif
 
-#if _USE_STOP(Z,,MIN,ENABLED(Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN))
+#if _USE_STOP(Z,,MIN,ENABLED(Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN)) && !(ENABLED(USE_PROBE_FOR_Z_HOMING) && DISABLED(Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN)) 
   #define USE_Z_MIN 1
 #endif
 #if _USE_STOP(Z,,MAX,)
   #define USE_Z_MAX 1
 #endif
-#if _HAS_STATE(Z,,MIN)
+#if _HAS_STATE(Z,,MIN) || ENABLED(USE_PROBE_FOR_Z_HOMING)
   #define HAS_Z_MIN_STATE 1
 #endif
 #if _HAS_STATE(Z,,MAX)