`meson dist` don't imply a reconfigure or a rebuild which is actually
not great as it means a wrong order of commands may create tarballs with
outdated data (typically: build, then pull new code, then dist).
Of course for our official tarballs, it should be fine as we don't
generate tarballs manually anymore, but through the CI. Yet, just to be
on the safe side, force-trigger a reconfigure then a build (which would
likely be very fast anyway in the common use case where we just did a
build right before).
Additionally the INSTALL.in file is not copied anymore in the tarball
and INSTALL will only be generated in git repositories.