Helpers removed

[08volt]

issue #1902

Removed all these helper dependencies from the cloud-provider
grep -r "k8s.io/cloud-provider/service/helpers" pkg/
pkg/l4lb/l4netlbcontroller_test.go: "k8s.io/cloud-provider/service/helpers"
pkg/l4lb/l4lbcommon.go: "k8s.io/cloud-provider/service/helpers"
pkg/utils/patch/patch.go: svchelpers "k8s.io/cloud-provider/service/helpers"
pkg/neg/controller.go: "k8s.io/cloud-provider/service/helpers"
pkg/loadbalancers/l4netlb_test.go: servicehelper "k8s.io/cloud-provider/service/helpers"
pkg/loadbalancers/l4netlb.go: "k8s.io/cloud-provider/service/helpers"
pkg/loadbalancers/l4.go: "k8s.io/cloud-provider/service/helpers"
pkg/loadbalancers/l4_test.go: servicehelper "k8s.io/cloud-provider/service/helpers"
pkg/healthchecksl4/healthchecksl4.go: "k8s.io/cloud-provider/service/helpers"

[k8s-ci-robot]

Hi @08volt. Thanks for your PR.

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[k8s-ci-robot]

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