refactor(sensors_monitor): ros2 port #56

Job	Run time
diagnostic_aggregator on humble	3m 22s
diagnostic_aggregator on iron	3m 28s
diagnostic_aggregator on rolling	1m 52s
diagnostic_common_diagnostics on humble	4m 6s
diagnostic_common_diagnostics on iron	3m 18s
diagnostic_common_diagnostics on rolling	2m 36s
diagnostic_updater on humble	3m 27s
diagnostic_updater on iron	3m 29s
diagnostic_updater on rolling	2m 40s
self_test on humble	3m 59s
self_test on iron	3m 48s
self_test on rolling	2m 20s
	38m 25s

Provide feedback