STM32: No compile-time check for PWM_PIN (#18539)

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

Marlin/src/HAL/STM32/fastio.h

 #define IS_OUTPUT(IO)
 
 #define PWM_PIN(P)              digitalPinHasPWM(P)
+#define NO_COMPILE_TIME_PWM
 
 // digitalRead/Write wrappers
 #define extDigitalRead(IO)    digitalRead(IO)