Fix lint issues in vertical pod autoscaller

...on-controller/resource/pod/patch/resource_updates_test.go

...ler/pkg/admission-controller/resource/vpa/handler_test.go

...aler/pkg/recommender/checkpoint/checkpoint_writer_test.go

...al-pod-autoscaler/pkg/recommender/input/cluster_feeder.go

...d-autoscaler/pkg/recommender/input/cluster_feeder_test.go

...input/controller_fetcher/controller_cache_storage_test.go

...ecommender/input/controller_fetcher/controller_fetcher.go

...ender/input/controller_fetcher/controller_fetcher_test.go

...oscaler/pkg/recommender/input/history/history_provider.go

...er/pkg/recommender/input/history/history_provider_test.go

...ical-pod-autoscaler/pkg/recommender/input/oom/observer.go

...pod-autoscaler/pkg/recommender/input/oom/observer_test.go

...caler/pkg/recommender/input/spec/spec_client_test_util.go

...al-pod-autoscaler/pkg/recommender/logic/estimator_test.go

...r/pkg/recommender/model/aggregate_container_state_test.go

...ical-pod-autoscaler/pkg/recommender/model/cluster_test.go

...al-pod-autoscaler/pkg/recommender/routines/recommender.go

...utoscaler/pkg/recommender/util/decaying_histogram_test.go

vertical-pod-autoscaler/pkg/target/fetcher.go

vertical-pod-autoscaler/pkg/updater/main.go