🌱Bump cert-manager to 1.15.3

[troy0820]

What this PR does / why we need it:
This updates cert manager to a newer version

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #
Last time this was done: #10988

/area clusterctl

[k8s-ci-robot]

@troy0820: 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-main	4e86112	link	false	/test pull-cluster-api-apidiff-main

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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[neolit123]

/lgtm

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 1061cacc20c16de2093890d074f1e2f3b1cc80df

[troy0820]

/assign @sbueringer

Also not sure this needs a backport or not.

[sbueringer]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: sbueringer

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[sbueringer]

/cherry-pick release-1.8

[k8s-infra-cherrypick-robot]

@sbueringer: once the present PR merges, I will cherry-pick it on top of release-1.8 in a new PR and assign it to you.

In response to this:

/cherry-pick release-1.8

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[sbueringer]

/cherry-pick release-1.7

[k8s-infra-cherrypick-robot]

@sbueringer: once the present PR merges, I will cherry-pick it on top of release-1.7 in a new PR and assign it to you.

In response to this:

/cherry-pick release-1.7

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[k8s-infra-cherrypick-robot]

@sbueringer: new pull request created: #11094

In response to this:

/cherry-pick release-1.8

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[k8s-infra-cherrypick-robot]

@sbueringer: new pull request created: #11095

In response to this:

/cherry-pick release-1.7

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