JWT token scope extended to a playlist instead of a resource

[AlfredPichard]

See #1342 and #2249

Purpose

The JWT token used in the application (the LTI one) is only focused on a resource (a video or a document). We would like to extend this scope to a playlist. If you can access a resource in a playlist, then you should also have the right to access the other resources in the same playlist.

Proposal

Create a new token focused on playlist access, and a new IsTokenPlaylistRouteObject permission verifying the user has access to a playlist in core.permissions.

Replace IsTokenResourceRouteObject and IsTokenResourceRouteObjectRelated___ occurences by the new IsTokenPlaylistRouteObject in the API in :

• VideoViewSet
• ClassroomViewSet
• DocumentViewSet
• FileDepositoryViewSet
• MarkdownDocumentViewSet
  For IsTokenResourceRouteObject

And :

• TimedTextTrackViewSet
• LiveSessionViewSet
• SharedLiveMediaViewSet
• ThumbnailViewSet
• class ClassroomDocumentViewSet
  For IsTokenResourceRouteObjectRelated___