* moved validator/rpc/gateway under shared, validator/rpc/web is not visiable to the new shared gateway
* decided to have one lib with two methods if needed, status and stop are the same, however New and Start are not
* moved beacon's gateway to shared and moved the main func to its own /server folder
* goftm
* gofmt
* removed the extra loggin
* reduce visibility
* tighter visibilty of the shared lib for beacon and validator only for now
* fix patterns , ctx needs to be first param
* fix comments
* gofmt
* added enum for the caller id
* added unit test for gateway
* deprecated .WithDialer to .WithContextDialer
* changed the string callerId to uint8, and rearranged the Gateway struct based on the compiler
* fix 1 based on comment
* iota type
Co-authored-by: Raul Jordan <raul@prysmaticlabs.com>
