[receiver/k8s cluster receiver]add support for K8s leader extension i… #75

Job	Run time
arm-unittest-matrix (receiver-0)	7m 32s
arm-unittest-matrix (receiver-1)	8m 26s
arm-unittest-matrix (receiver-2)	10m 31s
arm-unittest-matrix (receiver-3)	7m 50s
arm-unittest-matrix (processor-0)	6m 3s
arm-unittest-matrix (processor-1)	7m 2s
arm-unittest-matrix (exporter-0)	5m 43s
arm-unittest-matrix (exporter-1)	10m 57s
arm-unittest-matrix (exporter-2)	5m 51s
arm-unittest-matrix (exporter-3)	6m 55s
arm-unittest-matrix (extension)	7m 40s
arm-unittest-matrix (connector)	6m 15s
arm-unittest-matrix (internal)	8m 53s
arm-unittest-matrix (pkg)	6m 51s
arm-unittest-matrix (cmd-0)	4m 33s
arm-unittest-matrix (other)	6m 19s
arm-unittest	1s
	1h 57m 22s

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