This avoids a couple of layers of error code conversion, reduces
dependency on cricket error types and allows us to preserve error
information from dcsctp. Along the way remove SendDataResult.
Bug: none
Change-Id: I1ad18a8f0b2fb181745b19c49f36f270708720c0
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/298305
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Commit-Queue: Tomas Gunnarsson <tommi@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#39619}