Add Spring gRPC Server Support

[philwebb]

Add support for gRPC server applications with features take from spring-grpc-server-spring-boot-autoconfigure.

The following differences are anticipated:

• Health support will be deferred to #49048.
• Security support will be deferred to #49047.
• Observation support will be deferred to #49056
• The ServletEnvironmentPostProcessor will be considered in #49050 as we'd rather keep the user in control of that property.
• Customizers will not initially be applied automatically to in-process servers #49151
• GrpcServerProperties will be restructured slightly and host/port properties will be dropped in favor of just using the address property (Having both has caused issues in the past).
• Some auto-configurations can be consolidated.
• Properties can be applied using a ServerBuilderCustomizer.
• A custom GrpcServletRegistration class can be used to aid with conditions.
• It might be possible to simplify OnGrpcNativeServerCondition in favor of ordered configurations with a first wins strategy.
• Support for @GrpcAdvice will be added with #49053.

Commits from Spring gRPC to consider:

• spring-projects/spring-grpc@d03b88a
• spring-projects/spring-grpc@22eb624