PS-744 ci clean untagged images, bump action used version

[nmaillat]

No description provided.

[Copilot]

Pull request overview

This PR updates the branch-delete cleanup workflow to use a newer AWS credentials action and extends the workflow to remove untagged images from AWS ECR Public repositories (prefixed ps-).

Changes:

• Bump aws-actions/configure-aws-credentials usage from v4 to v6 in the cleanup workflow.
• Add a new workflow step to enumerate ps- ECR Public repos and batch-delete untagged images with a summary report.

Comments suppressed due to low confidence (1)

.github/workflows/cleanup-ecr-on-branch-delete.yaml:34

• This workflow bumps aws-actions/configure-aws-credentials to @v6, but other workflows in this repo still use @v4 (e.g. .github/workflows/ci.yaml:338). Mixing major versions can introduce subtle behavior differences; consider standardizing on a single major version (and ideally pinning to a commit SHA if that’s the repo’s security policy).

        uses: aws-actions/configure-aws-credentials@v6
        with:
          aws-access-key-id: ${{ secrets.AWS_ECR_ACCESS_KEY_ID }}
          aws-secret-access-key: ${{ secrets.AWS_ECR_ACCESS_KEY_SECRET }}
          aws-region: us-east-1

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[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated 2 comments.

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[4rthem]

Check if image exists to silently ignore this error. Otherwise we should exit with an error code.