Buildbot is currently broken as the result of two incomplete semi-automated/bulk updates. #36964 updated buildbot without updating its plugins (or buildbot-worker, but it was updated later in #37168), I don't think this caused any problems, but we should try to avoid this in the future. More importantly, #38483 updated buildbot-pkg, which implicitly updates the plugins, so they now fail to build due to hash mismatches.

Things done

This PR updates all of buildbot to 1.1.1, and fixes the hashes of the plugins.

• Tested using sandboxing (nix.useSandbox on NixOS, or option build-use-sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Fits CONTRIBUTING.md.