[stable/zed] Implement tooling to sync Helm charts (#1108)

Pin chart requirements
Refactor godaddy-webhook chart name
Sync Neutron with Gerrit #914886
Drop language changes in tox.ini
Pin all charts with a simplified tool
Add linter job to make sure charts are synced
diff --git a/flake.nix b/flake.nix
index f29612c..4eec2f5 100644
--- a/flake.nix
+++ b/flake.nix
@@ -21,9 +21,9 @@
               go
               kubernetes-helm
               nixpkgs-fmt
+              patchutils
               poetry
               python311Packages.tox
-              vendir
             ];
           };
         }