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

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