linked collection

[ArtificialOwl]

add a way to link a normal account to a collection to avoid using an admin account to use the collection API.

nextcloud$ ./occ fulltextsearch:collection:link 
no collection linked to any user
nextcloud$ ./occ fulltextsearch:collection:link local test1
linked collection
nextcloud$ ./occ fulltextsearch:collection:link 
- Collection local linked to user test1
$ ./occ fulltextsearch:collection:link local --unlink
unlinked collection

• once linked, requests on the ocs API can be done using the non-admin user account,
• only one user can be linked to a collection,
• multiple collections can be linked to the same user,
• multiple collections can be linked to different users

[ArtificialOwl]

/backport to stable30

[ArtificialOwl]

/backport to stable29

[ArtificialOwl]

/backport to stable28