Plugins: Add aiida.storage to ENTRY_POINT_GROUP_FACTORY_MAPPING (#…

…5798)

This is required for functions like `get_entry_point_from_class` from
`aiida.plugins.entry_point` to properly resolve classes that are
registered with an entry point in the `aiida.storage` group.

aiida/plugins/entry_point.py

@@ -97,6 +97,7 @@ class EntryPointFormat(enum.Enum):
     'aiida.groups': factories.GroupFactory,
     'aiida.parsers': factories.ParserFactory,
     'aiida.schedulers': factories.SchedulerFactory,
+    'aiida.storage': factories.StorageFactory,
     'aiida.transports': factories.TransportFactory,
     'aiida.tools.dbimporters': factories.DbImporterFactory,
     'aiida.tools.data.orbital': factories.OrbitalFactory,