API for getting fully-qualified name in Cpp target #793

Job	Run time
check-diff / check	21s
c-embedded / arduino / arduino-tests (ubuntu-latest)	5m 26s
c-embedded / zephyr / zephyr-tests	31m 49s
c-embedded / patmos / Patmos-tests	29m 36s
	1h 7m 12s

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