[Bug]: oc_file_metadata preservation issues with trashbin

[PVince81]

⚠️ 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 (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• Nextcloud Server is running on 64bit capable CPU, PHP and OS.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

Metadata is lost after deleting and restoring a picture.

Steps to reproduce

1. Upload a picture
2. Check oc_files_metadata and see that its metadata was retrieved (ex: size, exif, etc)
3. Delete the file so it goes to trash
4. Check metadata in database again
5. Restore file from trash

Expected behavior

At step 3 the metadata should stay in the database.
At step 5 it should be back at least.

Installation method

No response

Operating system

No response

PHP engine version

No response

Web server

No response

Database engine version

No response

Is this bug present after an update or on a fresh install?

No response

Are you using the Nextcloud Server Encryption module?

No response

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

No response

List of activated Apps

N/A

Nextcloud Signing status

No response

Nextcloud Logs

No response

Additional info

It is likely that the wrong event is used for metadata deletion.

We should use one of the "removed from cache" event to purge the metadata of a file instead of the "deleted" event.

cc @CAR