fix: use %w instead of %v for error wrapping in fmt.Errorf

[Kritagya123611]

Changes

Use %w verb instead of %v in fmt.Errorf calls to preserve error chains, enabling errors.Is and errors.As to match wrapped errors correctly.

Affected packages:

• pkg/config
• pkg/docker
• pkg/functions
• pkg/k8s
• pkg/keda
• pkg/knative
• pkg/pipelines/tekton
• pkg/testing
• hack/cmd/components

/kind cleanup

Release Note

NONE

Docs

NONE

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: Kritagya123611 / name: Kritagya123611 (fa27053)

[knative-prow]

Welcome @Kritagya123611! It looks like this is your first PR to knative/func 🎉

[knative-prow]

Hi @Kritagya123611. Thanks for your PR.

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Regular contributors should join the org to skip this step.

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[knative-prow]

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[Kritagya123611]

Hi @dsimansk and @jrangelramos

Just a friendly reminder about this PR when you have a chance. I'd really appreciate any feedback. Thanks!