ci: Remove local action copies from common/, use bootc-dev/actions

[cgwalters]

The bootc-ubuntu-setup and setup-rust actions now live canonically in the bootc-dev/actions repository. Remove the copies from common/ that were being synced to other repos, and update sync-common.yml to reference the shared action instead.

The test-bootc-ubuntu-setup workflow is also removed since it tested the local copy; testing should happen in the bootc-dev/actions repo.

The next sync-common run will automatically delete the stale .github/actions/ directories from repos that received them previously.

Assisted-by: OpenCode (Claude Opus)

Closes: #123

[gemini-code-assist]

Summary of Changes

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This pull request streamlines the CI/CD infrastructure by centralizing shared GitHub Actions. It removes redundant local copies of the bootc-ubuntu-setup and setup-rust actions, ensuring that all projects utilize the authoritative versions from the bootc-dev/actions repository. This consolidation simplifies maintenance, reduces duplication across repositories, and shifts the responsibility for action testing to its dedicated source repository.

Highlights

• Action Consolidation: Centralized the bootc-ubuntu-setup and setup-rust GitHub Actions into the bootc-dev/actions repository for shared use.
• Local Action Removal: Eliminated the redundant local copies of these actions from the common/ directory within this repository.
• Workflow Streamlining: Removed the test-bootc-ubuntu-setup workflow, as testing for these actions will now occur in their dedicated canonical repository.

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Changelog

• common/.github/actions/bootc-ubuntu-setup/action.yml
  • Removed the local bootc-ubuntu-setup GitHub Action definition.
• common/.github/actions/setup-rust/action.yml
  • Removed the local setup-rust GitHub Action definition.

Ignored Files

• Ignored by pattern: .github/workflows/** (2)
  • .github/workflows/sync-common.yml
  • .github/workflows/test-bootc-ubuntu-setup.yml

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Code Review

This pull request successfully removes the local copies of bootc-ubuntu-setup and setup-rust GitHub Actions from the common/ directory. This change aligns with the goal of centralizing these actions in the bootc-dev/actions repository, promoting reusability and easier maintenance across projects. The removal of the test-bootc-ubuntu-setup workflow is also appropriate, as testing for these shared actions should now occur in their canonical repository.