docs: Properly document the cc_ubuntu_autoinstall module
Additionally, update the MetaSchema definition accordingly as all
modules now use the updated definition.
Additional Context
Test Steps
Merge type
[x] Squash merge using "Proposed Commit Message"
[ ] Rebase and merge unique commits. Requires commit messages per-commit each referencing the pull request number (#)
Proposed Commit Message
Additional Context
Test Steps
Merge type