[exporter/datadog] Add configurable reporter_period for host metadata… #17274

Job	Run time
arm-unittest-matrix (receiver-0)	5m 14s
arm-unittest-matrix (receiver-1)	6m 33s
arm-unittest-matrix (receiver-2)	8m 24s
arm-unittest-matrix (receiver-3)	6m 26s
arm-unittest-matrix (processor-0)	3m 14s
arm-unittest-matrix (processor-1)	4m 24s
arm-unittest-matrix (exporter-0)	3m 10s
arm-unittest-matrix (exporter-1)	9m 17s
arm-unittest-matrix (exporter-2)	4m 21s
arm-unittest-matrix (exporter-3)	5m 7s
arm-unittest-matrix (extension)	5m 18s
arm-unittest-matrix (connector)	4m 7s
arm-unittest-matrix (internal)	6m 14s
arm-unittest-matrix (pkg)	3m 31s
arm-unittest-matrix (cmd-0)	1m 21s
arm-unittest-matrix (cmd-1)	1m 59s
arm-unittest-matrix (other)	4m 4s
arm-unittest	1s
	1h 22m 45s

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