Make reactor names available at runtime #3938

Job	Run time
check-diff / check	20s
serialization / serialization-tests	9m 39s
c / ccpp / regular-tests (ubuntu-latest)	24m 1s
c / benchmarking / benchmark-tests	6m 48s
c / default / regular-tests (ubuntu-latest)	27m 18s
c / verifier / run (ubuntu-latest)	7m 53s
cpp / cpp-benchmark-tests / benchmark-tests	12m 4s
cpp / cpp-tests / regular-tests (ubuntu-latest)	50m 54s
cpp / cpp-ros2-tests / cpp-ros2-tests	42m 54s
py / py-tests / regular-tests (ubuntu-latest)	20m 29s
rs / rs-tests / regular-tests (ubuntu-latest, stable)	10m 24s
rs / rs-benchmark-tests / benchmark-tests	15m 18s
ts / benchmarking / benchmark-tests	5m 37s
ts / ts-tests / regular-tests (ubuntu-latest)	22m 30s
	4h 16m 9s

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