add batcher config to splunkhec exporter (#32563) #34

Job	Run time
collector-build	7m 0s
docker-build	7m 39s
supervisor-test	55s
kubernetes-test-matrix (v1.26.0, receiver/k8sclusterreceiver)	2m 47s
kubernetes-test-matrix (v1.26.0, processor/k8sattributesprocessor)	2m 30s
kubernetes-test-matrix (v1.26.0, receiver/kubeletstatsreceiver)	2m 32s
kubernetes-test-matrix (v1.26.0, receiver/k8sobjectsreceiver)	2m 38s
kubernetes-test-matrix (v1.25.3, receiver/k8sclusterreceiver)	2m 57s
kubernetes-test-matrix (v1.25.3, processor/k8sattributesprocessor)	2m 51s
kubernetes-test-matrix (v1.25.3, receiver/kubeletstatsreceiver)	2m 31s
kubernetes-test-matrix (v1.25.3, receiver/k8sobjectsreceiver)	2m 31s
kubernetes-test-matrix (v1.24.7, receiver/k8sclusterreceiver)	2m 57s
kubernetes-test-matrix (v1.24.7, processor/k8sattributesprocessor)	2m 50s
kubernetes-test-matrix (v1.24.7, receiver/kubeletstatsreceiver)	2m 35s
kubernetes-test-matrix (v1.24.7, receiver/k8sobjectsreceiver)	3m 0s
kubernetes-test-matrix (v1.23.13, receiver/k8sclusterreceiver)	2m 45s
kubernetes-test-matrix (v1.23.13, processor/k8sattributesprocessor)	2m 34s
kubernetes-test-matrix (v1.23.13, receiver/kubeletstatsreceiver)	2m 52s
kubernetes-test-matrix (v1.23.13, receiver/k8sobjectsreceiver)	2m 31s
kubernetes-test	1s
	58m 56s

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