further refactor common options and reduce grpc client arguments list length

[ldemailly]

grpc client arguments list is quite long

At some point we moved some common stuff in TLSOptions and wondering if we should have something else common for payload, n (called Exactly in http options), destination/serverAddr (though that last one could be in TLSOptions) - maybe CommonOptions or TLSAndWebOptions or something

Or use RunnerOptions

Originally posted by @ldemailly in #671 (comment)