[chore][cmd/telemetrygen] Fix deprecated method usage #30436

Job	Run time
docker-build	5m 27s
collector-build	5m 5s
supervisor-test	58s
kubernetes-test-matrix (v1.26.0, receiver/k8sclusterreceiver)	4m 37s
kubernetes-test-matrix (v1.26.0, processor/k8sattributesprocessor)	4m 40s
kubernetes-test-matrix (v1.26.0, receiver/kubeletstatsreceiver)	4m 9s
kubernetes-test-matrix (v1.26.0, receiver/k8sobjectsreceiver)	3m 10s
kubernetes-test-matrix (v1.25.3, receiver/k8sclusterreceiver)	4m 57s
kubernetes-test-matrix (v1.25.3, processor/k8sattributesprocessor)	4m 50s
kubernetes-test-matrix (v1.25.3, receiver/kubeletstatsreceiver)	4m 30s
kubernetes-test-matrix (v1.25.3, receiver/k8sobjectsreceiver)	3m 42s
kubernetes-test-matrix (v1.24.7, receiver/k8sclusterreceiver)	6m 18s
kubernetes-test-matrix (v1.24.7, processor/k8sattributesprocessor)	4m 28s
kubernetes-test-matrix (v1.24.7, receiver/kubeletstatsreceiver)	4m 29s
kubernetes-test-matrix (v1.24.7, receiver/k8sobjectsreceiver)	3m 11s
kubernetes-test-matrix (v1.23.13, receiver/k8sclusterreceiver)	5m 5s
kubernetes-test-matrix (v1.23.13, processor/k8sattributesprocessor)	4m 24s
kubernetes-test-matrix (v1.23.13, receiver/kubeletstatsreceiver)	4m 25s
kubernetes-test-matrix (v1.23.13, receiver/k8sobjectsreceiver)	3m 13s
kubernetes-test	1s
	1h 21m 39s

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