dont add non-server-side cols to returning for versioning

dont add non-server-side cols to returning for versioning

Fixed regression where using the :paramref:`_orm.Mapper.version_id_col`
feature with a regular Python-side incrementing column would fail to work
for SQLite and other databases that don't support "rowcount" with
"RETURNING", as "RETURNING" would be assumed for such columns even though
that's not what actually takes place.

Fixes: #9228
Change-Id: I6a1a7fa4d63e183fe4ef0fbfd3cb5cac03b26d78