GitHub Actions next steps

[barchetta]

Issue #4828 (PR #4830) covers doing an initial implementation of a PR validator using GitHub actions.

This issue covers next steps:

• Parallelization
  • Basic: examples, TCK Extracted TCK and examples into separate jobs. #5011
  • More advanced sharding
• Testing
  • Try test containers Vault tests #5026
  • Test container support for things that previously used pods for test dependencies #5021
  • Process junit test results (https://github.com/marketplace/actions/junit-report-action)
  • Add Windows build to PR validation workflow #6717
  • Native image (once we have a released version for Java 19) matrix
• Jobs
  • Setup an internal runner
  • Release job on internal runner
  • On schedule (nightly) jobs
• Other
  • Add OGHO OCA checker
  • Investigate using workflow_run to create a single workflow that can be specified in the repository PR validation configuration (instead of specifying all of the checks individually).
  • Evaluate if we need to re-validate PRs on every new commit to branch
  • Slack integration
  • Evaluate if we want Fail Fast: with shorter job times and ability to retry individual jobs, maybe we don't want this?
  • Archive arbitrary files
• Migrate PR validation
  • main GitHub actions #4830
  • helidon-3.x Use GitHub Action for helidon-3.x branch #6481
  • helidon-2.x Create Github Action for helidon-2.x branch #6516
  • helidon-1.x Create Github Action for helidon-1.x branch #6517

[romain-grecourt]

See #9111