I think we should have all proto files in one place. Therefore, here I'm moving the proto for identity service to `native` where all protos are. We can either do that or move all protos to another location but I'd have them in one place.
Additionally, I changed the folder name on the docker image from `proto` to `protos`. I this plural is better here because we may have multiple protos in each service (in the case of interservice communication, we already have that in the backup service), plus it's like this in other services so we should probably stay consistent about this.