Interpret enable_breathe and enable_exhale as never_run_doxygen optio… #252

Job	Run time
Install test using venv (ubuntu-22.04)	1m 0s
Unit Tests (ros:iron)	1m 24s
Install test using venv (ubuntu-24.04)	2m 44s
Unit Tests (ros:jazzy)	1m 22s
Unit Tests (ros:rolling)	1m 17s
	7m 47s

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