ci: try to suppress false failing check for create legacy checkpoint

[Borda]

What does this PR do?

remove false failing check for dryrun when uploading legacy checkpoint helps navigate what PRs are ready to land which need some more care

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📚 Documentation preview 📚: https://pytorch-lightning--20745.org.readthedocs.build/en/20745/

[github-actions]

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[Copilot]

Pull Request Overview

This PR adjusts the legacy checkpoints workflow to suppress false failing checks for legacy checkpoint creation by modifying the dryrun command.

• Updated the AWS_RUN environment variable command to include the region flag along with the dryrun option when push_to_s3 is false.

Comments suppressed due to low confidence (1)

.github/workflows/_legacy-checkpoints.yml:104

• Ensure that the addition of the '--region us-east-1' flag does not inadvertently change the intended behavior of the dryrun check in other parts of the workflow. If this is a temporary suppression, consider adding documentation or a comment to clarify the rationale for including the region flag.

python -c "print('AWS_RUN=' + str('' if '${{inputs.push_to_s3}}' == 'true' else '--region us-east-1 --dryrun'))" >> $GITHUB_ENV