WIP: Automatically determine dependency patch version

This is an experiment in automatically determining the latest patch releases of helm and kubectl from given starting versions.

The idea is that this could be used to build new versions of helm-install-image on a schedule instead of having to open an MR every time there is a new release.

The schedule could be configured in a follow up.

And in another follow up, we could look into re-using the tests in auto-deploy-image. If we want them in the test stage they might have to be remote templates; otherwise a pipeline trigger can also work.