Replace delete-merged-branch action with GitHub script - #1343

Replace delete-merged-branch action with GitHub script#1343

RileyJergerAmazon wants to merge 2 commits into

opensearch-project:mainopensearch-project/index-management-dashboards-plugin:mainfrom

RileyJergerAmazon:update-delete-branch-scriptRileyJergerAmazon/index-management-dashboards-plugin:update-delete-branch-scriptCopy head branch name to clipboard