refactor(sensors_monitor): ros2 port #59

Job	Run time
diagnostic_aggregator on humble	4m 26s
diagnostic_aggregator on iron	3m 50s
diagnostic_aggregator on rolling	2m 20s
diagnostic_common_diagnostics on humble	3m 52s
diagnostic_common_diagnostics on iron	4m 7s
diagnostic_common_diagnostics on rolling	2m 22s
diagnostic_updater on humble	3m 56s
diagnostic_updater on iron	3m 22s
diagnostic_updater on rolling	2m 15s
self_test on humble	4m 7s
self_test on iron	3m 24s
self_test on rolling	2m 25s
	40m 26s

Provide feedback