Definitions of LUCI entities that test the chromium/src codebase.

• master-only
  • builders not on the main waterfall that are only run against the master branch
  • milestone-specific versions of these builders do not exist
• versioned
  • builders on the main waterfall for milestones
  • milestones are being switched to use separate projects, so this is only used for milestones <= M83.
• ci.star
  • main waterfall builders that do post-submit testing against the master branch
  • when new milestones are created, milestone-specific versions of the builders will be created
• try.star, gpu.try.star, swangle.try.star
  • main waterfall builders that do pre-submit testing against the master branch
  • when new milestones are created, milestone-specific versions of the builders will be created