Bump golang.org/x/tools from 0.28.0 to 0.29.0 #2496

Job	Run time
Unit Test (knative/serving)	10m 24s
Unit Test (knative/networking)	4m 44s
Unit Test (knative/eventing)	13m 2s
Unit Test (knative/operator)	6m 50s
Unit Test (knative/client)	8m 12s
Unit Test (knative-extensions/eventing-autoscaler-keda)	5m 32s
Unit Test (knative-extensions/eventing-ceph)	5m 36s
Unit Test (knative-extensions/eventing-github)	5m 51s
Unit Test (knative-extensions/eventing-gitlab)	5m 22s
Unit Test (knative-extensions/eventing-kafka-broker)	10m 2s
Unit Test (knative-extensions/eventing-rabbitmq)	8m 17s
Unit Test (knative-extensions/eventing-redis)	5m 43s
Unit Test (knative-extensions/kn-plugin-admin)	5m 26s
Unit Test (knative-extensions/net-certmanager)	4m 42s
Unit Test (knative-extensions/net-contour)	5m 2s
Unit Test (knative-extensions/net-istio)	5m 20s
Unit Test (knative-extensions/net-kourier)	5m 17s
	1h 55m 22s

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