Release v0.3.1

[alculquicondor]

Release Checklist

• [ ] All OWNERS must LGTM the release proposal
• [x] Verify that the changelog in this issue and CHANGELOG (#773) is up-to-date
• [x] An OWNER prepares a draft release
  • [x] Write the change log into the draft release.
  • [x] Run make artifacts IMAGE_REGISTRY=registry.k8s.io/kueue GIT_TAG=$VERSION to generate the artifacts and upload the files in the artifacts folder to the draft release.
• [x] An OWNER creates a signed tag running git tag -s $VERSION and inserts the changelog into the tag description. To perform this step, you need a PGP key registered on github.
• [x] An OWNER pushes the tag with git push $VERSION
  • Triggers prow to build and publish a staging container image gcr.io/k8s-staging-kueue/kueue:$VERSION
• [x] Submit a PR against k8s.io, updating k8s.gcr.io/images/k8s-staging-kueue/images.yaml to promote the container images to production: https://github.com/kubernetes/k8s.io/pull/5288
• [x] Wait for the PR to be merged and verify that the image registry.k8s.io/kueue/kueue:$VERSION is available.
• [x] Publish the draft release prepared at the Github releases page.
• [x] Add a link to the tagged release in this issue: https://github.com/kubernetes-sigs/kueue/releases/tag/v0.3.1
• [x] Send an announcement email to sig-scheduling@kubernetes.io and wg-batch@kubernetes.io with the subject [ANNOUNCE] kueue $VERSION is released
• [x] Add a link to the release announcement in this issue: https://groups.google.com/g/kubernetes-sig-scheduling/c/8gYCrI-MqGU
• [x] For a major or minor release, update README.md, docs/setup/install.md, charts/kueue/Chart.yaml (appVersion) and chats/kueue/values.yaml (controllerManager.manager.image.tag) in main branch: #774

Changelog

- Fix a bug that the validation webhook doesn't validate the queue name set as a label when creating MPIJob. #711
- Fix a bug that updates a queue name in workloads with an empty value when using framework jobs that use batch/job internally, such as MPIJob. #713
- Fix a bug in which borrowed values are set to a non-zero value even though the ClusterQueue doesn't belong to a cohort. #759 
- Fix: Enforce borrowed=0 if ClusterQueue doesn't belong to a cohort. #761
- Fixed adding suspend=true job/mpijob by the default webhook. #765

[alculquicondor]

Waiting on an integration test for #758

[alculquicondor]

/assign /cc @tenzen-y

[tenzen-y]

Thank you for creating this!