Remove the githubgen allowlist #45141

Job	Run time
collector-build	6m 10s
docker-build	6m 12s
supervisor-test	51s
kubernetes-test-matrix (v1.30.0, receiver/k8sclusterreceiver)	5m 33s
kubernetes-test-matrix (v1.30.0, processor/k8sattributesprocessor)	7m 2s
kubernetes-test-matrix (v1.30.0, receiver/kubeletstatsreceiver)	4m 26s
kubernetes-test-matrix (v1.30.0, receiver/k8sobjectsreceiver)	3m 5s
kubernetes-test-matrix (v1.23.17, receiver/k8sclusterreceiver)	4m 51s
kubernetes-test-matrix (v1.23.17, processor/k8sattributesprocessor)	6m 32s
kubernetes-test-matrix (v1.23.17, receiver/kubeletstatsreceiver)	4m 41s
kubernetes-test-matrix (v1.23.17, receiver/k8sobjectsreceiver)	3m 12s
kubernetes-test	1s
	52m 36s

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