[stable28] Drop need of user folder

[artonge]

The versions are bound to the groupfolder and not the current user. So we can get the File object without the current user folder.
This helps in situations where no user is logged in, like background jobs.

Psalm errors already exist in stable28

[solracsf]

@artonge what about to previously check if the entity does not already exists?
Something like, L88:

if (!$this->groupVersionsMapper->exists($versionEntity) {
	$this->groupVersionsMapper->insert($versionEntity);
}

(or limited to file_id & timestamp instead checking the whole entity)
Couldn't it help with #2559 (comment) ?

[artonge]

artonge what about to previously check if the entity does not already exists?

It would hide the reason getVersionsForFileFromDB fails 🤔

[solracsf]

Can this be backported to 27?

[artonge]

/backport to stable27