bump cert-manager to 1.12.7

[bohrasd]

What this PR does / why we need it:
Bump cert-manager to 1.12.7

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

Special notes for your reviewer:
I'm not sure how to handle breaking changes in cert-manager 1.13, but I want the latest CVE patches released for 1.12 last week. If you people feel unnecessary please ignore me ;)

[k8s-ci-robot]

Hi @bohrasd. Thanks for your PR.

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[hakman]

/ok-to-test

[hakman]

Thanks @bohrasd!
/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hakman

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