Adds a command for building all release packages. This command
is primarily used by the release tool for building release output
in version branches. The release tool cannot build the release packages
configured in `master` as those packages could differ from the
packages available in a given version branch. Also, the build process
could have changed, so we want to have an API for building
release packages that is guaranteed to be consistent across branches.
PR Close#38656
Joey Perrott
George Kalpakas
Paul Gschwendtner