Update protos to follow style guide
Summary:
Resolves ENG-5651.
Made our protos follow the Style Guide.
WARNING: This is a breaking change! Fortunately, we don't use protos in prod yet, except keyserver cron job to update reserved usernames. Hopefully, format of that message hasn't been changed here, so at least in theory it should be fine.
NOTE: grpc-web codegen will be updated in the next diff, once we agree on casing here (this is very cumbersome to update each time)
Test Plan: Built identity, tunnelbroker, commtest, grpc_clients, rust-node-addon and native-rust-library. All CI jobs should pass.
Reviewers: varun, ashoat
Reviewed By: varun, ashoat
Subscribers: tomek
Differential Revision: https://phab.comm.dev/D10429