Consider storing tools version in env

We have many workflows that want to use the latest version of tools repository. This means that we change many workflow definitions on seemingly irrelevant PRs such as https://github.com/citusdata/packaging/pull/945

I suggest we come up with a way to share the common tools version that is used in all the workflows in a single place. A possible solution is to create an env file. See https://arinco.com.au/blog/github-actions-share-environment-variables-across-workflows/