symmetric relations: replace bogus rql2sql translation by a hook The hook ensures X r Y => Y r X iff r is symmetric. The rql-no-hook data importer receives a small amendment but note that: * there exist no test for it * its actual semantics are undefined Hence we cannot prove this hunk breaks nothing, because we cannot prove anything. Closes #3259713.

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sync_schema_props_perms('cw_source', syncprops=False)

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if schema['BigInt'].eid is None:

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    add_entity_type('BigInt')