feat: Add Sort method to kyaml fn Results

[sdowell]

Issues: kptdev/kpt#2195

[k8s-ci-robot]

Hi @sdowell. Thanks for your PR.

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[mengqiy]

/ok-to-test

[mengqiy]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mengqiy, sdowell

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