velero-plugin-for-* python 2.7 EOL causing push.yml to not publish

[kaovilai]

          Looks like images are not being published in https://hub.docker.com/r/velero/velero-plugin-for-aws/tags

Probably due to python 2.7 EOL

Run sudo apt-get install python2.7
  sudo apt-get install python[2](https://github.com/vmware-tanzu/velero-plugin-for-aws/actions/runs/12352241107/job/34468854424#step:4:2).7
  export CLOUDSDK_PYTHON="/usr/bin/python2"
  shell: /usr/bin/bash -e ***0***
  env:
    GOROOT: /opt/hostedtoolcache/go/1.22.10/x6[4](https://github.com/vmware-tanzu/velero-plugin-for-aws/actions/runs/12352241107/job/34468854424#step:4:4)
Reading package lists...
Building dependency tree...
Reading state information...
E: Unable to locate package python2.[7](https://github.com/vmware-tanzu/velero-plugin-for-aws/actions/runs/12352241107/job/34468854424#step:4:8)

Originally posted by @kaovilai in #7693 (comment)

[kaovilai]

Script used:

gfu && git branch --remote | cut -d ' '  -f 3 | grep -E '^upstream/release-' | sed 's/upstream\///g' | xargs -L 1 -S1024 -I {} sh -c "git checkout upstream/{} && (git checkout -b pushpython3{} || (git checkout pushpython3{} && git reset --hard upstream/{}))  && sed 's/python2.7/python3/g' .github/workflows/push.yml > .github/workflows/push.yml.new && mv .github/workflows/push.yml.new .github/workflows/push.yml && sed 's/python2/python3/g' .github/workflows/push.yml > .github/workflows/push.yml.new && mv .github/workflows/push.yml.new .github/workflows/push.yml && git add .github/workflows/push.yml && git commit -sm 'Fixes vmware-tanzu/velero#8522' && git push -u origin pushpython3{} --force && gh pr create --base {} --title '{}: push.yml python3' --body 'Fixes https://github.com/vmware-tanzu/velero/issues/8522'"

[kaovilai]

https://github.com/vmware-tanzu/velero-plugin-for-aws/actions/runs/12388809515/job/34580589641#step:5:10

More fixes needed by upping from unsupported gcloud auth

Error: The v0 series of google-github-actions/setup-gcloud is no longer maintained. It will not receive updates, improvements, or security patches. Please upgrade to the latest supported versions: 

[kaovilai]

superseded by #8523 as bumping python didn't fix issue since google gcloud actions also needed changing