New HardwareTimer for STM32 5.7.0 (#15655)

.travis.yml

Marlin/src/HAL/HAL_ESP32/timers.h

Marlin/src/HAL/HAL_SAMD51/timers.cpp

Marlin/src/HAL/HAL_STM32/HAL.cpp

Marlin/src/HAL/HAL_STM32/SoftwareSerial.cpp

Marlin/src/HAL/HAL_STM32/SoftwareSerial.h

Marlin/src/HAL/HAL_STM32/timers.cpp

Marlin/src/HAL/HAL_STM32/timers.h

Marlin/src/HAL/HAL_STM32F1/timers.cpp

Marlin/src/HAL/HAL_STM32_F4_F7/HAL.h

Marlin/src/HAL/HAL_TEENSY31_32/timers.cpp

Marlin/src/HAL/HAL_TEENSY35_36/timers.cpp

Marlin/src/module/stepper.cpp

Marlin/src/module/temperature.cpp

Marlin/src/module/temperature.h

buildroot/share/PlatformIO/boards/BigTree_Btt002.json

buildroot/share/PlatformIO/boards/BigTree_SKR_Pro.json

buildroot/share/PlatformIO/scripts/black_stm32f407vet6.py

buildroot/share/PlatformIO/scripts/generic_create_variant.py

.../PlatformIO/variants/BIGTREE_SKR_PRO_1v1/PeripheralPins.c