feat(ansible): add demo_artifacts role for sample maps and rosbag

[xmfcx]

• Adds a new autoware.dev_env.demo_artifacts role that downloads and extracts the sample maps and rosbag used by the planning-sim and rosbag-replay-simulation demos.
• Artifacts are pulled from autoware-files S3 (replacing the manual gdown from Google Drive in the docs) and verified with sha256 checksums.
• Wired into install_dev_env.yaml under tags [never, demo_artifacts] so it only runs when --tags demo_artifacts is requested explicitly.

Why

The demos currently require users to manually run gdown against Google Drive links and unzip into ~/autoware_map/, which is fragile (rate limits, expiring links) and inconsistent with how every other artifact set is provisioned. Moving the demo assets behind the same ansible/S3 pipeline as the ML models gives users a one-command setup and a reproducible path forward.

The role lays the artifacts out under the consolidated autoware_data/ structure proposed in the design discussion - maps under maps/demos/, rosbags under recordings/bags/demos/ - so this PR also seeds the new layout for an asset type that is currently misfiled under ~/autoware_map/.

---

• Part of: Restructure autoware_data folder #7068

Test plan

• Install the collection and run the role end to end:

  cd ~/projects/autoware/ansible
  ansible-galaxy collection install -f .
  ansible-playbook autoware.dev_env.install_dev_env --tags demo_artifacts --ask-become-pass

• Verify the resulting layout matches the README:

  tree -L 4 ~/autoware_data/maps/demos ~/autoware_data/recordings/bags/demos

  • ~/autoware_data/maps/demos/sample-map-planning/{lanelet2_map.osm,pointcloud_map.pcd,map_config.yaml,map_projector_info.yaml} exist
  • ~/autoware_data/maps/demos/sample-map-rosbag/{lanelet2_map.osm,pointcloud_map.pcd,map_projector_info.yaml} exist
  • ~/autoware_data/recordings/bags/demos/sample-rosbag/{metadata.yaml,sample-rosbag_0.db3} exist
• Re-run the playbook and confirm all tasks report ok (idempotent - no re-downloads, no re-extracts changing state).
• Confirm the role is opt-in: run ansible-playbook autoware.dev_env.install_dev_env --tags universe --check and verify demo_artifacts tasks are skipped.
• Verify checksums match the values in tasks/main.yaml:

  for f in ~/autoware_data/maps/demos/sample-map-planning.zip \
           ~/autoware_data/maps/demos/sample-map-rosbag.zip \
           ~/autoware_data/recordings/bags/demos/sample-rosbag.zip; do
    sha256sum "$f"
  done

• Run the planning-sim demo against ~/autoware_data/maps/demos/sample-map-planning/ and confirm RViz loads the map.
• Run the rosbag-replay demo against ~/autoware_data/maps/demos/sample-map-rosbag/ and ~/autoware_data/recordings/bags/demos/sample-rosbag/ and confirm playback.

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