send execution options to connection also

send execution options to connection also

Session level :paramref:`_orm.Session.execution_options` now take
effect for Core level SQL emitted by unit of work operations, in
addition to their existing use within ORM statement executions.
This is to provide for Core options such as
:paramref:`_engine.Connection.execution_options.schema_translate_map`
to be applicable to a :class:`.Session` overall.

Fixes: #13346
Change-Id: Icb453b7925f1bc38f30538d7726d222842bc65bd