Use local Updatecli CLI reference sync

[AkashKumar7902]

Summary

• replace the two remote ghcr.io/updatecli/policies/file:0.2.1 compose entries with a local Updatecli manifest
• copy cli-docs.md from kubewarden/kwctl and kubewarden/policy-server before the existing header/PR step runs
• remove the now-unused values files for the defunct remote policy

Fixes #677

Checklist

• I have read and understood the Kubewarden AI Policy.

AI usage

OpenAI Codex assisted with this contribution. I reviewed the generated changes and am responsible for them.

Testing

• rg -n "ghcr\.io/updatecli/policies/file|update-kwctl-cli-ref-docs|update-policy-server-cli-ref-docs" updatecli .github || true
• yq e . updatecli/update-cli-ref-docs.yaml >/dev/null
• yq e . updatecli/updatecli.d/copy-cli-ref-docs.yaml >/dev/null
• verified cli-docs.md exists on kubewarden/kwctl and kubewarden/policy-server main branches with gh api
• git diff --cached --check

I could not run the Updatecli compose locally because updatecli is not installed, and pulling ghcr.io/updatecli/updatecli:v0.94.0 with Docker is denied by GHCR in this environment.

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[jhkrug]

Hello @AkashKumar7902,

You appear not to have used our docs PR template, which included the following:

• I have read and understood the Kubewarden AI Policy

Please reinstate this, and answer accordingly. Feel free to reach out to me to discuss in person, if necessary.

Thank you

[AkashKumar7902]

Thanks, I missed that. I restored the checklist in the PR description and confirmed the AI Policy acknowledgement.

[AkashKumar7902]

Following up on the merge conflict. Looking at main, jvanz already addressed the underlying breakage in #677 via 8de45b0 / cbe9c02 / a48d707 (commits on main) — those switched the updatecli sources to point at the kubewarden-controller monorepo (crates/kwctl/cli-docs.md, crates/policy-server/cli-docs.md) using the existing ghcr.io/updatecli/policies/file:0.2.1 policy.

This PR took a different angle (defining the copy logic locally with updatecli's git scm + file kind so we no longer depend on the external updatecli policy image). Now that main has a working sync via the upstream policy, the local approach is no longer required to fix the failing job from #677.

Happy to either:

1. Close this as superseded by the main-branch fix.
2. Rebase and rework on top of main if you still want the local-policy independence (the conflict is in updatecli/values.d/ so I'd be replacing the new files rather than deleting them).

@viccuad @jvanz @flavio — what would you prefer? Defaulting to (1) unless you'd like (2).