Fixes and improvements for PWM pins (#13383)

Marlin/src/HAL/HAL_AVR/fastio_AVR.h

Marlin/src/HAL/HAL_DUE/fastio_Due.h

Marlin/src/HAL/HAL_ESP32/fastio_ESP32.h

Marlin/src/HAL/HAL_LINUX/fastio.h

Marlin/src/HAL/HAL_LPC1768/fastio.h

Marlin/src/HAL/HAL_STM32/fastio_STM32.h

Marlin/src/HAL/HAL_STM32F1/fastio_STM32F1.h

Marlin/src/HAL/HAL_STM32F4/fastio_STM32F4.h

Marlin/src/HAL/HAL_STM32F7/fastio_STM32F7.h

Marlin/src/HAL/HAL_TEENSY31_32/fastio_Teensy.h

Marlin/src/HAL/HAL_TEENSY35_36/fastio_Teensy.h

Marlin/src/Marlin.cpp

Marlin/src/feature/caselight.cpp

Marlin/src/feature/controllerfan.cpp

Marlin/src/feature/leds/leds.cpp

Marlin/src/gcode/control/M3-M5.cpp

Marlin/src/gcode/control/M42.cpp

Marlin/src/gcode/feature/caselight/M355.cpp

Marlin/src/gcode/host/M115.cpp

Marlin/src/inc/Conditionals_post.h