update cloud-init clean cmdline remove additional network, machine-id and cloud artifacts

[blackboxsw]

• I have added unit tests to cover the new behavior under ``tests/unit_tests/```
• I have run tox -e format locally to automatically format my code before submitting
• I have run tox locally ensuring that it passes before submitting
• (if applicable) I have added a reference to issues that this PR relates to in the PR message (Refs GH-1234, Fixes GH-1234)
• My commits are atomic and follow the convetional commit message format (https://www.conventionalcommits.org/en/v1.0.0/)

Description

Add functionality to use new cloud-init clean params to remove stale cloud-init artifacts from previous boots.
Retain fallback for older versions of cloud-init which may not yet support the -c all param.

cloud-init version 23.1 introduced new commandline options to cloud-init clean:

1. --machine-id to uninitialize /etc/machine-id
2. -c all which remove previous boot artifacts such as /etc/netplan/50-cloud-init.yaml and and cloud artifacts (generated by azure)

Additional Context and Relevant Issues

Test Steps

[Copilot]

Pull request overview

This PR updates the clean() method to leverage newer cloud-init clean options (--machine-id and -c all) introduced in cloud-init version 23.1, with a fallback mechanism for older cloud-init versions that don't support these parameters.

Changes:

• Updated BaseInstance.clean() to use cloud-init clean --logs --machine-id -c all by default
• Added fallback logic to retry with cloud-init clean --logs if the -c all option is unrecognized
• Added comprehensive unit tests covering success, fallback, and edge cases
• Version bumped to 1!10.17.0

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
pycloudlib/instance.py	Updated clean method to use new cloud-init options with fallback for older versions
tests/unit_tests/test_instance.py	Added TestClean class with unit tests covering various scenarios for the updated clean method
VERSION	Bumped version from 1!10.16.0 to 1!10.17.0

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[blackboxsw]

CC: @hammerstefan @uhryniuk. Hello CPC folks, just wanted to raise awareness that this move represents moving toward image support for images with cloud-init > 23.4. This shouldn't break anything CPC side for testing because it falls back to original behavior, but it raises a question or two:

• Does CPC test infra run any tests actively against images earlier than focal with updates?
• Is there any CPC image build operation that invokes cloud-init clean which could benefit from additional --machine-id -c all params?