Setting up scripts downloads whole tarball of gh-aw repo

[dsyme]

On performance, I asked the agents about this (we do this 3-4 times but the cost of download is only once as the download is cached):

      - name: Setup Scripts
        uses: github/gh-aw/actions/setup@9513a842d1c5cc736f198db66155b26fc619af6a # v0.43.7
        with:
          destination: /opt/gh-aw/actions

The analysis is that this downloads a tarball/zip of the whole gh-aw repository at that SHA - not just the actions directory.

It suggests using a separate repository to hold the share library of actions. Alternatively I think these SHA could point to a stripped-back version of the repository with all other files deleted.

[pelikhan]

yikes. this is going to be tricky.