**Is your feature request related to a problem? Please describe.** the workaround for clearing duplicated ci/cd runs (https://github.com/Project-MONAI/MONAI/pull/1511) could be replaced by the github action new feature with the `concurrency` keyword: https://github.blog/changelog/2021-04-19-github-actions-limit-workflow-run-or-job-concurrency/