Rework kata, kata-cc images into release and debug images with different package compositions.

[Camelron]

Merge Checklist

• Followed patch format from upstream recommendation: https://github.com/kata-containers/community/blob/main/CONTRIBUTING.md#patch-format
  • Included a single commit in a given PR - at least unless there are related commits and each makes sense as a change on its own.
• Aware about the PR to be merged using "create a merge commit" rather than "squash and merge" (or similar)
• The upstream/missing label (or upstream/not-needed) has been set on the PR.

Summary

Introduce logic to install the new schema of UVM images/components for kata containers and kata-cc, which are as follows:

kata-containers.img
kata-containers-debug.img
kata-containers-cc.img
kata-containers-cc-debug.img

Associated igvm, igvm-debug files for CC now map to the -cc and -cc-debug images respectively. This will allow for greater flexibility in composing these UVM images, allowing us to have different package compositions for production vs. debug pod sandboxes.

Test Methodology

[sprt]

Can you fix the commit message check? Probably easier to squash into 1 and paste your PR description into that.

[Copilot]

PR Overview

This PR reworks the kata and kata-cc image composition to support separate release and debug images with distinct package sets.

• Removed the AGENT_POLICY_FILE configuration option from the README in the azure-linux builder documentation.
• Updated documentation to align with the new UVM image/component schema.

Reviewed Changes

File	Description
tools/osbuilder/node-builder/azure-linux/README.md	Updated the confpods section by removing the AGENT_POLICY_FILE parameter to reflect the new image schema.

Copilot reviewed 11 out of 11 changed files in this pull request and generated no comments.

Comments suppressed due to low confidence (1)

tools/osbuilder/node-builder/azure-linux/README.md:173

• The removal of the AGENT_POLICY_FILE parameter should be clearly documented. Ensure that any related usage references or instructions are updated to reflect that this option is no longer available.

* `AGENT_POLICY_FILE`: Specify `allow-set-policy.rego` (default) to use

[manuelh-dev]

Can you fix the commit message check? Probably easier to squash into 1 and paste your PR description into that.

Maybe good to factor the clean-rootfs change out in a separate commit

[sprt]

Mostly GTM. Let's also modifiy the Debug builds section of the readme so that those commands only build once (and not both release/debug).