Revert "metadata: Set tilde separator for rust2rpm.Metadata.version"
    
    This is not full fix, unfortunately since it breaks cargo-inspect. Paths
    on the file system are still with `-`.
    
    This reverts commit cfd315066399ad21bbf71a2d9fb52c78c2e0f0a6.
    
    Signed-off-by: Igor Gnatenko <ignatenkobrain@fedoraproject.org>