Entity autocomplete widget sends default revision to entity selection handler

Problem/Motivation

Follow up to 🐛 Entity autocomplete widget does not pass along entity to AJAX request Fixed - when testing this functionality, I noticed that the selection plugin was getting the default revision of an entity rather than the revision being edited in $this->configuration['entity]

When using the OptionsWidget, it receives the revision being edited.

Steps to reproduce

Debug into an EntityReferenceSelection when editing a non default revision and inspect $this->configuration['entity']

Proposed resolution

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