[Bug]: files_version author names are only shown to admins

[blizzz]

⚠️ 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

When a file is collaboratively edited, a user might want to see the author names in files_version. They can do this only, when they are admin however.

The reason is the API call in:

server/apps/files_versions/src/components/Version.vue

Line 301 in b06f5ba

const { data } = await axios.get(generateOcsUrl(`/cloud/users/${this.version.author}`))

It returns data on any user only for admins, but for ordinary users it shows information only about themselves.

It was implemented like this in #44109 but I am doubtful that this is intentional behaviour.

@artonge @susnux

Steps to reproduce

1. files_versions is enabled
2. A file is shared among users
3. The file is edited by two or more users
4. As an ordinary (non-admin) uses, open the files interface and open the Versions tab

Expected behavior

All author names (at least of still existing users) are visible.

Nextcloud Server version

>= 29

[solracsf]

See also nextcloud/groupfolders#3340