Free up space on github actions runners for all jobs.

[cmnbroad]

Add a github action to free up runner space for all jobs.

[lbergelson]

@cmnbroad If you want to make it an action you could take a look at the .github/actions directory. We have two actions defined there. Then they can be invokes by their relative path. Here is an example:

   - uses: ./.github/actions/install-cromwell
        with:
          CROMWELL_VERSION: ${{ env.CROMWELL_VERSION }}

[lbergelson]

Sorry, I made it harder...

[cmnbroad]

@lbergelson Its all good - this is definitely better.

[lbergelson]

Actions: shell scripts but the long way around.

[lbergelson]

Looks Github To Me 👍

[cmnbroad]

Thanks for the tip, and the review @lbergelson.