If an application uses both rest & grpc, How can I opt not to start gRPC server which currently starts automatically with no flag available to stop this.

**The context**

What do you wish to achieve?

**The question**

What's the problem? What's not working? What's missing and why do you need it?

**Stacktraces and logs**

Do you have any relevant stacktraces or logs of your attempts?

**The application's environment**

Which versions do you use?
* Spring (boot):
* grpc-java:
* grpc-spring-boot-starter:
* java: version + architecture (64bit?)
* Other relevant libraries...

**Additional information**

* Did it ever work before?
* How can we reproduce it?
* Do you have a demo?

The issue does not name files, tests, versions, or a reproducible example. Start by reproducing a Spring Boot application that uses REST and gRPC, then trace the starter's automatic gRPC server startup and its configuration options. Done should mean the application can explicitly opt out of starting the gRPC server, with the behavior covered by a test and documented.

Written by the indexing model from the issue text.