refactor(sensors_monitor): ros2 port #60

Job	Run time
diagnostic_aggregator on humble	3m 26s
diagnostic_aggregator on iron	3m 48s
diagnostic_aggregator on rolling	2m 14s
diagnostic_common_diagnostics on humble	3m 44s
diagnostic_common_diagnostics on iron	3m 52s
diagnostic_common_diagnostics on rolling	2m 26s
diagnostic_updater on humble	3m 20s
diagnostic_updater on iron	3m 41s
diagnostic_updater on rolling	2m 36s
self_test on humble	3m 52s
self_test on iron	4m 4s
self_test on rolling	2m 31s
	39m 34s

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