The `content_entity` migration source has been ported from the module `migrate_drupal_d8` → which in turn makes the module deprecated. Because this is a port, we would expect the source plugins (deprecated one and core one) to work the same. But, as it turns out, the new core version does not seem to support external Drupal 8 databases, as the module did.
Has this support been dropped intendedly? Is there any other way to get the `content_entity` from Core to connect to a external database? Or is this just a missing feature?
FWIW, I noticed that the deprecated source plugin extends SqlBase (which makes sure we can connect to an external Database) and the core one does not.
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