docs: finish RST→MD conversion on circinus

Remove docs/changelog/*.rst (per-version release notes no longer
maintained in-tree on rolling — the changelog dir was already
dropped there). The standalone docs/_ext/releasenotes.py generator
script's filename refs are output paths for manual regeneration,
not Sphinx build inputs, so they remain unchanged in parallel with
rolling.

Port docs/automation/terraform/terraformvyos.md from rolling and
remove the lingering terraformvyos.rst. This was the only remaining
live RST file outside the archive on circinus.

🤖 Generated by [robots](https://vyos.io)

0 files changed, 0 insertions, 0 deletions