Rebase CPA to distroless

[yuwenma]

This is part of the effort described in kep kubernetes/enhancements#900

[yuwenma]

/assign @MrHohn
/assign @erictune

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[MrHohn]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: MrHohn

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[MrHohn]

/hold
Will merge this once I verify locally.

[MrHohn]

Seems to be working locally. Merging this.
/hold cancel