Move from ratelimit.proto to rls.proto in data-plane-api

[junr03]

https://github.com/envoyproxy/data-plane-api/blob/master/api/rls.proto

[jsedgwick]

@junr03 description seems wacky, do you mean that we want to migrate ratelimit's proto dependency from

https://github.com/lyft/ratelimit/blob/master/proto/ratelimit/ratelimit.proto

to

https://github.com/envoyproxy/data-plane-api/blob/master/envoy/service/ratelimit/v2/rls.proto

?

And what about envoy's dep -
https://github.com/envoyproxy/envoy/blob/master/source/common/ratelimit/ratelimit.proto?

Seems like a lot of copypasta...

I can work on this once the intention is clarified.

[junr03]

Assigning back to myself. Will do as part of Lyft's work on this area for Q2