refactor(sensors_monitor): ros2 port #55

Job	Run time
diagnostic_aggregator on humble	3m 20s
diagnostic_aggregator on iron	4m 27s
diagnostic_aggregator on rolling	2m 28s
diagnostic_common_diagnostics on humble	3m 33s
diagnostic_common_diagnostics on iron	3m 30s
diagnostic_common_diagnostics on rolling	2m 23s
diagnostic_updater on humble	3m 35s
diagnostic_updater on iron	3m 25s
diagnostic_updater on rolling	2m 16s
self_test on humble	4m 4s
self_test on iron	3m 16s
self_test on rolling	2m 16s
	38m 33s

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