setup dependabot.yml to group PRs (#3864) #2484

Job	Run time
snyk (workloads/discovery-statefulset.yaml)	23s
snyk (workloads/cleanup-static-definitions-cronjob.yaml)	22s
display-dispatch-event-id	0s
snyk (workloads/gateway-deployment.yaml)	25s
snyk (samples/api-catalog-service.yaml)	25s
snyk (samples/gateway-service-ci.yaml)	26s
snyk (samples/gateway-service-np.yaml)	35s
snyk (samples/gateway-service-lb.yaml)	19s
snyk (samples/horizontal-pod-autoscaler/gateway-hpa.yaml)	27s
snyk (samples/pod-disruption-budget/gateway-pdb.yaml)	21s
snyk (samples/bare-metal/gateway-ingress.yaml)	16s
snyk (samples/openshift/gateway-route.yaml)	15s
snyk (samples/workspace-pvc.yaml)	23s
	4m 37s

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