#2863992 Moved a refined version of the contributed Media entity module to core as Media module

from:
  fqn: 'service:plugin.manager.media_entity.type'
to:
  fqn: 'service:plugin.manager.media.source'
from:
  fqn: \Drupal\media_entity\Entity\Media
to:
  fqn: \Drupal\media\Entity\Media
from:
  fqn: \Drupal\media_entity\Entity\MediaBundle
to:
  fqn: \Drupal\media\Entity\MediaType
from:
  fqn: \Drupal\media_entity\MediaAccessController
to:
  fqn: \Drupal\media\MediaAccessControlHandler
from:
  fqn: \Drupal\media_entity\MediaTypeManager
to:
  fqn: \Drupal\media\MediaSourceManager