[release-1.4] 🌱 Update cert-manager to v1.12.2

[k8s-infra-cherrypick-robot]

This is an automated cherry-pick of #8883

/assign killianmuldoon

[killianmuldoon]

/lgtm
/approve

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 55b27b214eb6a6b8e5463ba8b257f68e8ff6477c

[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-1-4	c74279a	link	false	/test pull-cluster-api-apidiff-release-1-4

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[sbueringer]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: killianmuldoon, sbueringer

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[killianmuldoon]

/area dependency