Adds support for Cloud Build substitutions. Added cloudbuild-good.yaml and cloudbuild-bad.yaml with substitutions and deleted cloudbuild-good.yaml.template and cloudbuild-bad.yaml.template. (Also updated the cloud.google.com doc "Creating attestations with Kritis" to instruct how to use gcloud builds submit with substitutions.
Adds support for Cloud Build substitutions. Added cloudbuild-good.yaml and cloudbuild-bad.yaml with substitutions and deleted cloudbuild-good.yaml.template and cloudbuild-bad.yaml.template. (Also updated the cloud.google.com doc "Creating attestations with Kritis" to instruct how to use
gcloud builds submitwith substitutions.