[core] Tracking item: add GlobalFeature.ParameterizedServerPerOperation

I was not clear. There are actually 2 features to track:

1. Support for global server configuration with templated values (all Java)
2. Support for server configuration per endpoint (only jersey2, go-experimental)

Originally posted by @jirikuncar in https://github.com/OpenAPITools/openapi-generator/pull/5380

While we have a feature indicating "Global" parameterized server support, we should also have a feature which indicates the ability to parameterize a server for a given operation. Example use case would be multi-tenant APIs where username/account may indicate a different server rather than a different resource on the same server as in REST.