[extension/observer/k8sobserver] add k8s.ingress endpoint #33556

Job	Run time
docker-build	5m 56s
collector-build	5m 21s
supervisor-test	50s
kubernetes-test-matrix (v1.26.0, receiver/k8sclusterreceiver)	6m 15s
kubernetes-test-matrix (v1.26.0, processor/k8sattributesprocessor)	4m 29s
kubernetes-test-matrix (v1.26.0, receiver/kubeletstatsreceiver)	4m 28s
kubernetes-test-matrix (v1.26.0, receiver/k8sobjectsreceiver)	3m 11s
kubernetes-test-matrix (v1.25.3, receiver/k8sclusterreceiver)	4m 53s
kubernetes-test-matrix (v1.25.3, processor/k8sattributesprocessor)	4m 37s
kubernetes-test-matrix (v1.25.3, receiver/kubeletstatsreceiver)	4m 19s
kubernetes-test-matrix (v1.25.3, receiver/k8sobjectsreceiver)	3m 30s
kubernetes-test-matrix (v1.24.7, receiver/k8sclusterreceiver)	5m 4s
kubernetes-test-matrix (v1.24.7, processor/k8sattributesprocessor)	4m 24s
kubernetes-test-matrix (v1.24.7, receiver/kubeletstatsreceiver)	4m 43s
kubernetes-test-matrix (v1.24.7, receiver/k8sobjectsreceiver)	4m 2s
kubernetes-test-matrix (v1.23.13, receiver/k8sclusterreceiver)	4m 45s
kubernetes-test-matrix (v1.23.13, processor/k8sattributesprocessor)	5m 54s
kubernetes-test-matrix (v1.23.13, receiver/kubeletstatsreceiver)	4m 18s
kubernetes-test-matrix (v1.23.13, receiver/k8sobjectsreceiver)	3m 20s
kubernetes-test	1s
	1h 24m 20s

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