The tools folder allows us a space to define and pin external dependencies. If they are go based tools we can create individual mod files that allow us to download or install these tools independent of the main package.

1. k8s.io/code-gen this package needs to be downloaded not installed. But we can not use the copy created in the vendor folder because vendor does not make a complete clone, it only keeps the Go files, and the code-gen project has several bash scripts that we need to reference. The main project Makefile will attempt to keep the code-generator.mod file in sync with the go.mod. It should not need to be manually edited, but it does need to be committed.