🌱 Add machine pool template for Flatcar Linux

[AndiDog]

What type of PR is this?

/kind support

What this PR does / why we need it:

A MachinePool based cluster template existed for most other variants, but not for Flatcar Linux.

For review, I suggest diff-ing against cluster-template-flatcar.yaml.

Checklist:

• squashed commits
• includes documentation
• includes emoji in title
• adds unit tests
• adds or updates e2e tests

Release note:

Add machine pool template for Flatcar Linux

[richardcase]

/lgtm
/approve

[k8s-ci-robot]

LGTM label has been added.

Details

Git tree hash: fd698fa9aa54e0443f41bbf699f667bcc87d1c2e

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: richardcase

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Details

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• OWNERS [richardcase]

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[richardcase]

/cherrypick release-2.8

[k8s-infra-cherrypick-robot]

@richardcase: once the present PR merges, I will cherry-pick it on top of release-2.8 in a new PR and assign it to you.

Details

In response to this:

/cherrypick release-2.8

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[k8s-infra-cherrypick-robot]

@richardcase: new pull request created: #5534

Details

In response to this:

/cherrypick release-2.8

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.