[AKS] update control-plane-only user confirmation prompt

[m-chau]

---

This checklist is used to make sure that common guidelines for a pull request are followed.

Related command

az aks upgrade

General Guidelines

• Have you run azdev style <YOUR_EXT> locally? (pip install azdev required)
• Have you run python scripts/ci/test_index.py -q locally? (pip install wheel==0.30.0 required)
• My extension version conforms to the Extension version schema

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Once your pull request is merged into main branch, a new pull request will be created to update src/index.json automatically.
You only need to update the version information in file setup.py and historical information in file HISTORY.rst in your PR but do not modify src/index.json.

[azure-client-tools-bot-prd]

Hi @m-chau,
Please write the description of changes which can be perceived by customers into HISTORY.rst.
If you want to release a new extension version, please update the version in setup.py as well.

[azure-client-tools-bot-prd]

Validation for Breaking Change Starting...

Thanks for your contribution!

[yonzhan]

Thank you for your contribution! We will review the pull request and get back to you soon.

[github-actions]

The git hooks are available for azure-cli and azure-cli-extensions repos. They could help you run required checks before creating the PR.

Please sync the latest code with latest dev branch (for azure-cli) or main branch (for azure-cli-extensions).
After that please run the following commands to enable git hooks:

pip install azdev --upgrade
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[github-actions]

Hi @m-chau

⚠️ Release Requirements

Module: aks-preview

• ⚠️ Please update VERSION to be 19.0.0b15 in src/aks-preview/setup.py

Notes

• For more info about extension versioning, please refer to Extension version schema

[Copilot]

Pull Request Overview

This PR improves the clarity of the warning message displayed during control-plane-only AKS upgrades by providing more detailed information about what will and won't be upgraded.

• Enhanced the user-facing message to explicitly clarify that only the Kubernetes version of the control plane is upgraded
• Added important information about node pool behavior: Kubernetes versions remain unchanged, but node image versions may still be upgraded if cluster config changes require VM reimage

[Copilot]

There are two consecutive spaces after "to" in this line. It should be "control plane to {instance.kubernetes_version}" with only one space.

Suggested change

	"Since control-plane-only argument is specified, this will upgrade only the kubernetes version of the control plane to "
	"Since control-plane-only argument is specified, this will upgrade only the kubernetes version of the control plane to "

[FumingZhang]

please resolve merge conflict and fix failed CI checks

[FumingZhang]

/azp run

[azure-pipelines]

Azure Pipelines will not run the associated pipelines, because the pull request was updated after the run command was issued. Review the pull request again and issue a new run command.

[yonzhan]

/azp run

[azure-pipelines]

Azure Pipelines will not run the associated pipelines, because the pull request was updated after the run command was issued. Review the pull request again and issue a new run command.

[yonzhan]

Please fix CI issues