The repo is not needed any more, because the Google Cloud SDK is not
installed in the images by default. If anyone wants to install the SDK,
they can add the appropriate repo definition.
The Google SDK ships pre-compiled binaries. It is undesirable to install
it by default in `gce` and `gce-rhui` in its current shape. Also not
installing it does not anyhow affect the RHEL integration as the guest
OS in GCP.
Blueprint package set is now depsolved together with the OS package set
in a chain. The result is stored in the package specs sets under the OS
package set name.
In reality, the code was able to handle a `nil` package specs to be
passed to pipelines, however some parts were looking for the kernel
version in the blueprint package specs, which would be a bug.
Regenerated affected image test cases.
Add the `gce-rhui` image type intended for Google Compute Engine. The image
uses Google's RHUI infrastructure to access Red Hat content.
Signed-off-by: Tomas Hozza <thozza@redhat.com>
