1. Proposed title of this feature request
-> RouteExternalCertificate in the cluster

2. What is the nature and description of the request?
-> A lot of ingress-controllers already have this function, but in OpenShift still not released.

3. Why does the customer need this? (List the business requirements here)
-> Do not save TLS/SSL certificates in objects "routes". This is not safe.
Save TLS/SSL certificates for object "routes" in "secrets". This will be a more safety when we use OpenShift + Hashicorp Vault Secret Operator with GitOps practice.

4. List any affected packages or components.
-> N/A