Implement fine-grained policy controls over your certificate issuance using certificate templates

## Feature Implement fine-grained policy controls over your certificate issuance using certificate templates. Certificate templates can be used in conjunction with IAM conditions to effectively create different policy controls for different users on the same CA pool. You can test certificate issuance in a validation mode and proactively identify conflicts between the CA pool's issuance policies and the certificate template's policies. For information, see [Request a certificate using a certificate template](https://cloud.google.com/certificate-authority-service/docs/issue-certificate-using-template). The feature is in General Availability (GA).