Refactor gpu-installer cloud build config to plug in with top level repo cloudbuild

Top level cloud build will receive substitutions from the automated gerrit trigger.

Tested by manually executing top level cloud build:
```
tools$ gcloud builds submit --config=cloudbuild.yaml
--substitutions=_OUTPUT_PROJECT="rnv-dev-301509",COMMIT_SHA=$(git
rev-parse HEAD)
```

https://cloud.google.com/build/docs/configuring-builds/substitute-variable-values
: $COMMIT_SHA is provided as default substitutions for all builds

BUG=b/183723138

Change-Id: Ic2d44a1d1e0eebecdbd7f93c60407d9e8a765118
Reviewed-on: https://cos-review.googlesource.com/c/cos/tools/+/16290
Cloud-Build: GCB Service account <228075978874@cloudbuild.gserviceaccount.com>
Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com>
Tested-by: Robert Kolchmeyer <rkolchmeyer@google.com>
3 files changed
tree: 1a1c030338739ee0994ebbe62a3a648e8d2e6ea6
  1. src/
  2. cloudbuild.yaml
  3. CONTRIBUTING.md
  4. go.mod
  5. go.sum
  6. LICENSE
  7. README.md
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.