remove deprecated dynatrace exporter #30571

Job	Run time
collector-build	7m 6s
docker-build	7m 32s
supervisor-test	1m 7s
kubernetes-test-matrix (v1.26.0, receiver/k8sclusterreceiver)	4m 55s
kubernetes-test-matrix (v1.26.0, processor/k8sattributesprocessor)	4m 20s
kubernetes-test-matrix (v1.26.0, receiver/kubeletstatsreceiver)	4m 15s
kubernetes-test-matrix (v1.26.0, receiver/k8sobjectsreceiver)	3m 20s
kubernetes-test-matrix (v1.25.3, receiver/k8sclusterreceiver)	4m 46s
kubernetes-test-matrix (v1.25.3, processor/k8sattributesprocessor)	4m 27s
kubernetes-test-matrix (v1.25.3, receiver/kubeletstatsreceiver)	4m 41s
kubernetes-test-matrix (v1.25.3, receiver/k8sobjectsreceiver)	3m 15s
kubernetes-test-matrix (v1.24.7, receiver/k8sclusterreceiver)	4m 54s
kubernetes-test-matrix (v1.24.7, processor/k8sattributesprocessor)	4m 32s
kubernetes-test-matrix (v1.24.7, receiver/kubeletstatsreceiver)	4m 38s
kubernetes-test-matrix (v1.24.7, receiver/k8sobjectsreceiver)	3m 31s
kubernetes-test-matrix (v1.23.13, receiver/k8sclusterreceiver)	4m 39s
kubernetes-test-matrix (v1.23.13, processor/k8sattributesprocessor)	4m 23s
kubernetes-test-matrix (v1.23.13, receiver/kubeletstatsreceiver)	4m 20s
kubernetes-test-matrix (v1.23.13, receiver/k8sobjectsreceiver)	3m 18s
kubernetes-test	1s
	1h 24m 0s

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