Improved handling of `files` target property #3140

Job	Run time
check-diff / check	24s
serialization / serialization-tests	7m 49s
py / py-tests / regular-tests (ubuntu-latest)	16m 51s
rs / rs-benchmark-tests / benchmark-tests	15m 54s
rs / rs-tests / regular-tests (ubuntu-latest, stable)	8m 19s
ts / ts-tests / regular-tests (ubuntu-latest)	19m 53s
ts / benchmarking / benchmark-tests	3m 35s
c / benchmarking / benchmark-tests	7m 22s
c / default / regular-tests (ubuntu-latest)	25m 59s
c / verifier / run (ubuntu-latest)	5m 28s
c / ccpp / regular-tests (ubuntu-latest)	22m 18s
cpp / cpp-benchmark-tests / benchmark-tests	11m 41s
cpp / cpp-ros2-tests / cpp-ros2-tests	29m 10s
cpp / cpp-tests / regular-tests (ubuntu-latest)	29m 6s
	3h 23m 49s

Provide feedback