Upgrade to grpc v1.63.0
What does this MR do and why?
This release fixes two key issues with the Ruby gem:
We added a monkey patch for the first pull request, but now that the fix has been merged upstream we can drop it. This has the added benefit of eliminating an occasional test seg fault due to a race condition in the gRPC shutdown code.
The second pull request doesn't affect us since we aren't using Ruby 3.3 yet.
Relates to #426677 (closed)
Edited by Stan Hu