🌱 Add template metadata to CABPK and KCP types

[sbueringer]

Signed-off-by: Stefan Büringer [email protected]

What this PR does / why we need it:
This PR adds metadata in the following places:

• KubeadmConfigTemplate.spec.template.metadata
• KubeadmControlPlaneTemplate.spec.template.metadata
• KubeadmControlPlaneTemplate.spec.template.spec.machineTemplate.metadata

This is a prepartion for the upcoming PR to test propagation.

Based on the proposal these fields should be propagated but they don't exist today: https://github.com/kubernetes-sigs/cluster-api/blob/main/docs/proposals/images/in-place-propagation/proposed-changes.png

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 #

[sbueringer]

/assign @fabriziopandini

[sbueringer]

/retest

[killianmuldoon]

Could you also add the ObjectMeta back to the implementers guide in the book? i.e. on this page: https://cluster-api.sigs.k8s.io/developer/providers/bootstrap.html

ref: https://github.com/kubernetes-sigs/cluster-api/pull/6935/files#r923255539

[sbueringer]

Done

[k8s-ci-robot]

@sbueringer: 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	51f4450	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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[killianmuldoon]

/lgtm

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: c2dfcc0c8d269c9395599f45c2c6608243babfd9

[fabriziopandini]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: fabriziopandini

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