also, add a target of `dist-server`, which mirrors the structure
of the targets created by `configure.py`, and it is consistent
with the ones defined by `build_submodule()`.
so that they are built when our CI runs `ninja -C $build`. CI
expects that all these rpm and deb packages to built when
`ninja -C $build` finishes. so that it can continue with
building the container image. let's make it happen. so that
the CMake-based rules can work better with CI.
Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>
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