Merge pull request #2431 from lf-lang/cpp_fqn_fix #799

Job	Run time
check-diff / check	18s
c-embedded / zephyr / zephyr-tests	54m 5s
c-embedded / patmos / Patmos-tests	33m 47s
c-embedded / arduino / arduino-tests (ubuntu-latest)	5m 32s
	1h 33m 42s

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