grpc: 1.39.1 -> 1.40.0

[marsam]

Motivation for this change

https://github.com/grpc/grpc/releases/tag/v1.40.0

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• 21.11 Release Notes (or backporting 21.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

[marsam]

@GrahamcOfBorg build murmur bear

[orivej]

This update has broken libtensorflow and sysdig (and their dependents: https://hydra.nixos.org/eval/1702650#tabs-now-fail); the apparent cause is that grpc now generates code that has to be linked to libabsl_synchronization, but users of the generated code do not link to it.

[SuperSandro2000]

Sounds like it needs to be added to propagatedBuildInputs.

[marsam]

@orivej sorry about that, it should be fixed by #137456