and update Docker images so they require hashes.

commit ab7384e
Author: Jeffrey Rennie <rennie@google.com>
Date:   Tue Aug 23 11:38:48 2022 -0700

    fix: remove pip install statements (googleapis#1546)

    because the tools are already installed in the docker image as of googleapis/testing-infra-docker#227

commit 302667c
Author: WhiteSource Renovate <bot@renovateapp.com>
Date:   Tue Aug 23 19:50:28 2022 +0200

    chore(deps): update dependency setuptools to v65.2.0 (googleapis#1541)

    Co-authored-by: Anthonios Partheniou <partheniou@google.com>

commit 6e9054f
Author: WhiteSource Renovate <bot@renovateapp.com>
Date:   Tue Aug 23 19:42:51 2022 +0200

    chore(deps): update dependency nbconvert to v7 (googleapis#1543)

    Co-authored-by: Anthonios Partheniou <partheniou@google.com>

commit d229a12
Author: Alexander Fenster <fenster@google.com>
Date:   Mon Aug 22 15:04:53 2022 -0700

    fix: update google-gax and remove obsolete deps (googleapis#1545)

commit 13ce626
Author: Jeffrey Rennie <rennie@google.com>
Date:   Mon Aug 22 11:08:21 2022 -0700

    chore: remove release config and script (googleapis#1540)

    We don't release to pypi anymore.

to move forward with other languages until Java's docker image is fixed