ipatests: remove xfail for test_ipa_migrate_version_option
    
    The test test_ipa_ipa_migration.py::TestIPAMigrateScenario1::
    test_ipa_migrate_version_option is now passing, issue has been fixed.
    The -V option has been removed.
    
    Related: https://pagure.io/freeipa/issue/9620
    
    Signed-off-by: Florence Blanc-Renaud <flo@redhat.com>
    Reviewed-By: Sudhir Menon <sumenon@redhat.com>