Backport #30291 by @edwardzhanged
Add some logic in `convert.ToBranchProtection` to return only the names
associated with readAccess instead of returning all names. This will
ensure consistency in behavior between the frontend and backend.
Fixes: #27694
Co-authored-by: Edward Zhang <45360012+edwardzhanged@users.noreply.github.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.com>
Co-authored-by: wenzhuo.zhang <wenzhuo.zhang@geely.com>