Introduce cloud build trigger release process script

Sample release-versions.yaml config:
```
- container_name: "toolbox"
  build_commit: "4910d0158ba497795fdfd4172e2315e83d169f40"
  release_tags:
    - "latest"
    - "va.b.c"
- container_name: "cos-customizer"
  build_commit: "4910d0158ba497795fdfd4172e2315e83d169f40"
  release_tags:
    - "latest"
    - "vx.y.z"
```

BUG=b/184579125

Change-Id: I485964635f391c120bf2cc35bc3bfcfb7d240720
Reviewed-on: https://cos-review.googlesource.com/c/cos/tools/+/17890
Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com>
Cloud-Build: GCB Service account <228075978874@cloudbuild.gserviceaccount.com>
Tested-by: Arnav Kansal <rnv@google.com>
4 files changed
tree: e7450ab7495faeab5273b4f2e16dedf220a9f024
  1. release/
  2. src/
  3. testing/
  4. BUILD.bazel
  5. cloudbuild.yaml
  6. CONTRIBUTING.md
  7. deps.bzl
  8. go.mod
  9. go.sum
  10. LICENSE
  11. README.md
  12. run_tests.sh
  13. WORKSPACE
README.md

Tools for Container-Optimized OS

This is a repository of various tools developed for Container-Optimized OS. Examples include cos-gpu-installer, cos-toolbox, etc.

See CONTRIBUTING.md for how to contribute.