refactor(sensors_monitor): ros2 port #61

Job	Run time
diagnostic_aggregator on humble	4m 4s
diagnostic_aggregator on iron	3m 42s
diagnostic_aggregator on rolling	2m 30s
diagnostic_common_diagnostics on humble	3m 53s
diagnostic_common_diagnostics on iron	3m 59s
diagnostic_common_diagnostics on rolling	2m 19s
diagnostic_updater on humble	3m 21s
diagnostic_updater on iron	3m 9s
diagnostic_updater on rolling	2m 17s
self_test on humble	3m 30s
self_test on iron	3m 45s
self_test on rolling	2m 41s
	39m 10s

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