This enables tests that depend on the compound lib.

Squashed commit of the following:

commit b5bbb445
Author: Xavier Robin <xavier.robin@unibas.ch>
Date:   Wed Feb 14 15:45:21 2024 +0100

    Revert "CI: test a CI failure"

    This reverts commit 494222f9.

commit 494222f9
Author: Xavier Robin <xavier.robin@unibas.ch>
Date:   Wed Feb 14 15:40:47 2024 +0100

    CI: test a CI failure

    This worfklow is expected to fail with an error in
    test_ligand_scoring.py_run. If it fails it means the compound lib is
    properly setup.

commit 7d06d517
Author: Xavier Robin <xavier.robin@unibas.ch>
Date:   Wed Feb 14 15:27:45 2024 +0100

    CI: download compounds after first build

commit 89edc43d
Author: Xavier Robin <xavier.robin@unibas.ch>
Date:   Wed Feb 14 15:18:25 2024 +0100

    CI: use make as documented in the wiki

commit 4f94f46d
Author: Xavier Robin <xavier.robin@unibas.ch>
Date:   Wed Feb 14 15:03:45 2024 +0100

    CI: try to download and build a compound lib

commit 5d16d160
Author: Xavier Robin <xavier.robin@unibas.ch>
Date:   Wed Feb 14 14:55:55 2024 +0100

    CI: try to link the compound lib differently

commit 1e9803eb
Author: Xavier Robin <xavier.robin@unibas.ch>
Date:   Wed Feb 14 14:31:07 2024 +0100

    CI: try to use the group compound lib

    This is likely to fail if we don't have the right mounts...