This adds support for specifying a version _constraint_ for the version
of gcloud. Since the GitHub Actions runners pre-install a version of
gcloud, this can dramatically reduce CI times.
⚠️🚧
As part of the 1.0 release, we removed service_account support from
setup-gcloud, but many of the integration tests were actually duplicates
now, since they used to test service_account. This updates the
integration tests to run all the tests in a single job (reducing the
number of times we install NPM packages and download gcloud).
* First pass of cleanup of old actions code
* fixed primary CHANGELOG file from setup-gcloud shift
* cleaning up old workflows
* removing working-directory spec as it's no longer needed
* Moar cleanup on the path to cleanup redemption
* "it now builds and tests pass locally"
* lint error cleanup
* More path cleanup
* addressing PR comments, more cleanup
* missed two files in last update
* Update README.md
Co-authored-by: Averi Kitsch <akitsch@google.com>
