🔧(back) add base aws storage for legacy medias

As part of our migration away from AWS, media files will be served from
Scaleway S3 and Edge services using the Django Storage backend in place.
Adding the base directory containing legacy media within the bucket.

Author: wilbrdt

src/backend/marsha/core/defaults.py

@@ -177,6 +177,7 @@
     (SCW_S3, _("SCW")),
 )
 
+AWS_STORAGE_BASE_DIRECTORY = "aws"
 TMP_STORAGE_BASE_DIRECTORY = "tmp"
 DELETED_STORAGE_BASE_DIRECTORY = "deleted"
 VOD_STORAGE_BASE_DIRECTORY = "vod"
@@ -186,6 +187,7 @@
 DOCUMENT_STORAGE_BASE_DIRECTORY = "document"
 
 STORAGE_BASE_DIRECTORY = (
+    (AWS_STORAGE_BASE_DIRECTORY, _("AWS")),
     (TMP_STORAGE_BASE_DIRECTORY, _("tmp")),
     (VOD_STORAGE_BASE_DIRECTORY, _("VOD")),
     (CLASSROOM_STORAGE_BASE_DIRECTORY, _("Classroom")),