public static final class Secret.Builder extends GeneratedMessageV3.Builder<Secret.Builder> implements SecretOrBuilder Pairs a set of secret environment variables containing encrypted
values with the Cloud KMS key to use to decrypt the value.
Note: Use kmsKeyName with available_secrets instead of using
kmsKeyName with secret. For instructions see:
https://cloud.google.com/cloud-build/docs/securing-builds/use-encrypted-credentials.
Protobuf type google.devtools.cloudbuild.v1.Secret