ci: update global workflow and cleanup release config file

[derberg]

• new https://github.com/derberg/manage-files-in-multiple-repositories/releases/tag/v2.1.0
• new workflow that we can use specifically for removing files only
• update to have commit message always the same
• use static branch name, so one PR per repo and not n PR per repo depending how many jobs were triggered

all was driven by need to move a release config file from .github/workflows to root of repo that needs it