[processor/logstransform]: Fix shutdown ordering leading to panic #26299

Job	Run time
collector-build	5m 50s
docker-build	5m 40s
kubernetes-test-matrix (v1.26.0, receiver/k8sclusterreceiver)	4m 45s
kubernetes-test-matrix (v1.26.0, processor/k8sattributesprocessor)	3m 20s
kubernetes-test-matrix (v1.26.0, receiver/kubeletstatsreceiver)	4m 19s
kubernetes-test-matrix (v1.26.0, receiver/k8sobjectsreceiver)	3m 24s
kubernetes-test-matrix (v1.25.3, receiver/k8sclusterreceiver)	5m 1s
kubernetes-test-matrix (v1.25.3, processor/k8sattributesprocessor)	3m 21s
kubernetes-test-matrix (v1.25.3, receiver/kubeletstatsreceiver)	4m 13s
kubernetes-test-matrix (v1.25.3, receiver/k8sobjectsreceiver)	3m 14s
kubernetes-test-matrix (v1.24.7, receiver/k8sclusterreceiver)	4m 54s
kubernetes-test-matrix (v1.24.7, processor/k8sattributesprocessor)	3m 21s
kubernetes-test-matrix (v1.24.7, receiver/kubeletstatsreceiver)	4m 17s
kubernetes-test-matrix (v1.24.7, receiver/k8sobjectsreceiver)	3m 20s
kubernetes-test-matrix (v1.23.13, receiver/k8sclusterreceiver)	4m 48s
kubernetes-test-matrix (v1.23.13, processor/k8sattributesprocessor)	3m 27s
kubernetes-test-matrix (v1.23.13, receiver/kubeletstatsreceiver)	4m 28s
kubernetes-test-matrix (v1.23.13, receiver/k8sobjectsreceiver)	3m 29s
supervisor-test	48s
kubernetes-test	1s
	1h 16m 0s

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