Support gRPC server configuration options

[docktermj]

Currently, no options are available for the gRPC server.

https://github.com/Senzing/serve-grpc/blob/26bd70eb20182b55a61b7c51ff03668d946312b1/grpcserver/grpcserver.go#L279

grpc.NewServer(...) does support ServerOptions.

Code similar to:

// Create generated server options.

serverOptions := []senzinghttpapi.ServerOption{
	grpc.ConnectionTimeout(600),
}

if someBool {
	serverOptions = append(serverOptions, grpc.HeaderTableSize(1024))
}

// Create server.

aGrpcServer := grpc.NewServer(serverOptions...)

Should be added to support multiple configurations of gRPC server.

Another approach is seen at:

• https://github.com/Senzing/go-observing/blob/main/grpcserver/grpcserver_impl.go where a

ServerOptions []grpc.ServerOption

is part of the struct and is populated by the caller.