[cmd/telemetrygen] Add exemplars support for telemetrygen #34263

Job	Run time
collector-build	5m 27s
docker-build	5m 48s
supervisor-test	52s
kubernetes-test-matrix (v1.26.0, receiver/k8sclusterreceiver)	4m 35s
kubernetes-test-matrix (v1.26.0, processor/k8sattributesprocessor)	4m 29s
kubernetes-test-matrix (v1.26.0, receiver/kubeletstatsreceiver)	4m 7s
kubernetes-test-matrix (v1.26.0, receiver/k8sobjectsreceiver)	3m 22s
kubernetes-test-matrix (v1.25.3, receiver/k8sclusterreceiver)	4m 43s
kubernetes-test-matrix (v1.25.3, processor/k8sattributesprocessor)	4m 26s
kubernetes-test-matrix (v1.25.3, receiver/kubeletstatsreceiver)	4m 27s
kubernetes-test-matrix (v1.25.3, receiver/k8sobjectsreceiver)	3m 13s
kubernetes-test-matrix (v1.24.7, receiver/k8sclusterreceiver)	4m 49s
kubernetes-test-matrix (v1.24.7, processor/k8sattributesprocessor)	4m 27s
kubernetes-test-matrix (v1.24.7, receiver/kubeletstatsreceiver)	4m 15s
kubernetes-test-matrix (v1.24.7, receiver/k8sobjectsreceiver)	3m 26s
kubernetes-test-matrix (v1.23.13, receiver/k8sclusterreceiver)	4m 36s
kubernetes-test-matrix (v1.23.13, processor/k8sattributesprocessor)	4m 24s
kubernetes-test-matrix (v1.23.13, receiver/kubeletstatsreceiver)	4m 14s
kubernetes-test-matrix (v1.23.13, receiver/k8sobjectsreceiver)	3m 16s
kubernetes-test	1s
	1h 18m 57s

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