Bump golangci-lint to v2

[ameukam]

bumping golangci-lint to a version that support Go 1.25

[k8s-ci-robot]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[hakman]

Could you add the description of each of these as comment?

[k8s-ci-robot]

@ameukam: 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-kops-e2e-k8s-aws-calico	53bc622	link	true	/test pull-kops-e2e-k8s-aws-calico

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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