Migrate config to PHP

[franmomu]

Closes #807

I've made some changes that we need to see if they are fine.

• I've split the file because if was easier to check.
• Removed unused services (I haven't found any usage and seem old):
  • doctrine_mongodb.odm.cache as alias of doctrine_mongodb.odm.cache.array
  • doctrine_mongodb.odm.cache.array
• Removed some parameters ending in .class and use the class directly in the service as second argument.
• Change these alias:

  <service id="%doctrine_mongodb.odm.document_manager.class%" alias="doctrine_mongodb.odm.document_manager" public="false" />
  <service id="%doctrine_mongodb.odm.class%" alias="doctrine_mongodb" public="false" />

  I'm not sure if that can be done in PHP and I've changed them to (I guess we can change them in the extension resolving the parameter, but not sure if that's necessary):

  ->alias(DocumentManager::class, 'doctrine_mongodb.odm.document_manager')
  ->alias(ManagerRegistry::class, 'doctrine_mongodb')

[GromNaN]

Thank you @franmomu