[Bug]: master: Quota is set to "-3" instead of real value like before

[tobiasKaminsky]

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

Free value of quota has changed on master.

Steps to reproduce

Check quota via api:
Stable30:
free: 123690659840
quota: -3
total: 123690660004
relative: 0.0

Master:
free: -3
quota: -3
total: -3
relative: 0.0

Expected behavior

Have the same like before / on stable 30.

Nextcloud Server version

master

[tobiasKaminsky]

Ref: #49476

(found by Marcel)

[come-nc]

@tobiasKaminsky @icewind1991

(from linked PR)

This does lead to a minor change in behavior, that for users with unlimited quota, the reported quota no longer falls back to the free space in the data directory. As far as I can tell these fields aren't used in the accounts ui and that behavior isn't something that can be relied on anyway, since s3 based setups (and various others) won't have this behavior anyway.

So if I understand correctly this description from @icewind1991 , it is an expected behavior change, which should not have a big impact.
@tobiasKaminsky Is it ok if we keep the change and update any relevant documentation instead?