Update grpc to 1.42, protobuf to 3.19
What does this MR do and why?
This updates grpc
and related dependencies to 1.42.0. Please see the original MR in gitaly for what changes were made and why: gitaly!4108 (merged) (it was reverted.)
A review-app with these changes is deployed here: https://gitlab-review-339305-upd-ah39p4.gitlab-review.app/
MR acceptance checklist
This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.
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I have evaluated the MR acceptance checklist for this MR.
Related to #339305 (closed)
Edited by Matthias Käppler