BlockContentBlock makes use of BlockContentUuidLookup class directly instead of using interface

Problem/Motivation

Currently BlockContentBlock is making use of the injected service BlockContentUuidLookup by defining it directly by class name and not by interface, which makes it only possible to extend the BlockContentUuidLookup service and blocks the possibility to replace it with your own.

Proposed resolution

BlockContentUuidLookup is extending the CacheCollector class which implements the CacheCollectorInterface.
Replace the use of Drupal\block_content\BlockContentUuidLookup with Drupal\Core\Cache\CacheCollectorInterface inside the BlockContentBlock class.