Support for STM32 #1893

Job	Run time
build-rti / run (ubuntu-latest)	7s
build-rti / run (macos-latest)	14s
build-rti / run (windows-latest)	18s
build-trace-tools / run (ubuntu-latest)	4s
build-trace-tools / run (macos-latest)	13s
build-trace-tools / run (windows-latest)	11s
unit-tests-single / run (ubuntu-latest)	6s
fetch-lf / extract-ref	7s
unit-tests-multi / run (ubuntu-latest)	8s
unit-tests-multi / run (macos-latest)	15s
unit-tests-single / run (macos-latest)	14s
unit-tests-multi / run (windows-latest)	1m 8s
unit-tests-single / run (windows-latest)	1m 10s
lf-default-arduino / arduino-tests (ubuntu-latest)	9s
lf-default-arduino / arduino-tests (macos-latest)	12s
lf-default-zephyr / zephyr-tests	9s
lf-adaptive / regular-tests (ubuntu-latest)	12s
lf-default / regular-tests (ubuntu-latest)	8s
lf-adaptive / regular-tests (macos-latest)	14s
lf-default / regular-tests (macos-latest)	9s
lf-adaptive / regular-tests (windows-latest)	14s
lf-default / regular-tests (windows-latest)	23s
lf-gedf-np / regular-tests (ubuntu-latest)	8s
lf-python / regular-tests (ubuntu-latest)	11s
lf-gedf-np / regular-tests (macos-latest)	4s
lf-python / regular-tests (macos-latest)	8s
lf-gedf-np / regular-tests (windows-latest)	10s
lf-python / regular-tests (windows-latest)	13s
	6m 59s

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