[exporter/awsemf] Drop redundant arg from addToGroupedMetric #25849

Job	Run time
collector-build	5m 42s
docker-build	5m 41s
kubernetes-test-matrix (v1.26.0, receiver/k8sclusterreceiver)	4m 46s
kubernetes-test-matrix (v1.26.0, processor/k8sattributesprocessor)	3m 22s
kubernetes-test-matrix (v1.26.0, receiver/kubeletstatsreceiver)	4m 7s
kubernetes-test-matrix (v1.26.0, receiver/k8sobjectsreceiver)	3m 20s
kubernetes-test-matrix (v1.25.3, receiver/k8sclusterreceiver)	4m 44s
kubernetes-test-matrix (v1.25.3, processor/k8sattributesprocessor)	3m 24s
kubernetes-test-matrix (v1.25.3, receiver/kubeletstatsreceiver)	4m 37s
kubernetes-test-matrix (v1.25.3, receiver/k8sobjectsreceiver)	3m 52s
kubernetes-test-matrix (v1.24.7, receiver/k8sclusterreceiver)	5m 2s
kubernetes-test-matrix (v1.24.7, processor/k8sattributesprocessor)	3m 17s
kubernetes-test-matrix (v1.24.7, receiver/kubeletstatsreceiver)	4m 13s
kubernetes-test-matrix (v1.24.7, receiver/k8sobjectsreceiver)	3m 19s
kubernetes-test-matrix (v1.23.13, receiver/k8sclusterreceiver)	4m 48s
kubernetes-test-matrix (v1.23.13, processor/k8sattributesprocessor)	3m 20s
kubernetes-test-matrix (v1.23.13, receiver/kubeletstatsreceiver)	4m 17s
kubernetes-test-matrix (v1.23.13, receiver/k8sobjectsreceiver)	3m 18s
supervisor-test	52s
kubernetes-test	1s
	1h 16m 2s

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