[12.0] Drop target from Kanban to Attachment Storage folder doesn't inherit properly res_model and res_id

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dms/dms/models/dms_file.py

Line 651 in d83558e

directory = directory_model.browse(self.env.context.get("active_id"))

Expected workflow:
When I drag and drop a file into a folder (with attachment storage) from the kanban view and attached to a record, I expect to create the attachment and be able to view from the record.

Results:
Record is created inside the folder but is not attached to the record.

Steps to reproduce this issue:

1. Create an attachment storage.
2. Create a folder linked to an existing employee (fastest removing the readonly property from the form record of res_id).
3. Drag and drop a file to this folder from the main kanban view
4. Check on the employee record the attachment (non exists)