Support hyphenated ROSIDL subdirs #228

Job	Run time
build-and-test / build (24.X, rolling)	7m 1s
build-and-test / build (24.X, kilted)	9m 30s
build-and-test / build (24.X, jazzy)	8m 38s
build-and-test / build (24.X, humble)	8m 19s
	33m 28s

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