Due to the desired patch branch (10.0.x) being on a semver version
that is unreleased as stable (there is no 10.0.0 on latest, it is on
next) our logic for determining target patch branches does not work.
This change is a workaround to unblock merging in the repo while a
longer term answer is discovered.
PR Close#37299
Migrate to using .ng-dev directory for ng-dev configuration to allow
better management of the configuration using multiple files. The
intention is to prevent the config file from becoming unruly.
PR Close#37299