update kustomize and golangci-lint

[cpanato]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

• update kustomize and golangci-lint

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

Special notes for your reviewer:

Please confirm that if this PR changes any image versions, then that's the sole change this PR makes.

TODOs:

• squashed commits
• includes documentation
• adds unit tests

Release note:

update kustomize and golangci-lint

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cpanato

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• OWNERS [cpanato]

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[damdo]

/retest

[k8s-ci-robot]

@cpanato: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-cluster-api-provider-gcp-e2e-test	5895107	link	true	/test pull-cluster-api-provider-gcp-e2e-test

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[richardcase]

Seems good to me, except the linter issues reported.

[k8s-ci-robot]

PR needs rebase.

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