[release-1.3] 🌱 Update cert-manager to v1.12.0

[k8s-infra-cherrypick-robot]

This is an automated cherry-pick of #8702

/assign killianmuldoon

[k8s-ci-robot]

@k8s-infra-cherrypick-robot: 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-cluster-api-apidiff-release-1-3	2fa7506	link	false	/test pull-cluster-api-apidiff-release-1-3

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[sbueringer]

/lgtm
/approve

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: f12e29b164e49686b526a733ee006cbdde9fdf62

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: sbueringer

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[g-gaston]

/area dependency