Update delete_backport_branch workflow to include release-chores branches#1940

RileyJergerAmazon wants to merge 2 commits intoopensearch-project:mainopensearch-project/observability:mainfrom

RileyJergerAmazon:update-delete-branch-workflowRileyJergerAmazon/observability:update-delete-branch-workflowCopy head branch name to clipboard