chore: update librarian to v0.23.1-0.20260630163952-027103b81777 and update utilities to address new .repo-metadata.json values#13586

sofisl wants to merge 7 commits into

maingoogleapis/google-cloud-java:mainfrom

fixJavaTransportgoogleapis/google-cloud-java:fixJavaTransportCopy head branch name to clipboard