Distinct runout states (#19965)

Co-authored-by: Scott Lahteine <thinkyhead@users.noreply.github.com>

Marlin/src/HAL/ESP32/fastio.h

@@ -52,6 +52,9 @@
 // Set pin as input with pullup wrapper
 #define SET_INPUT_PULLUP(IO)    do{ _SET_INPUT(IO); _PULLUP(IO, HIGH); }while(0)
 
+// Set pin as input with pulldown (substitution)
+#define SET_INPUT_PULLDOWN      SET_INPUT
+
 // Set pin as output wrapper
 #define SET_OUTPUT(IO)          do{ _SET_OUTPUT(IO); }while(0)