will call `SecretManager.GenerateSecret(resourceName)`
1. When `GenerateSecret` is called, the `SecretManager` is expected to return a new certificate. This can occur in a few ways.
   1. The most common method (pictured above) is to sign a new certificate by calling the configured CA. Typically, this is Istiod.
   1. If the certificate is not yet expired, the `SecretManager` also can return a cache response. In practice, this would