[stable-3.13] Fix crash when updating enabled File Provider domains (macOS VFS)

[backportbot[bot]]

Backport of #6833

Warning, This backport's changes differ from the original and might be incomplete ⚠️

Todo

• [x] Review and resolve any conflicts

• [x] Amend HEAD commit to remove the line stating to skip CI

Learn more about backports at https://docs.nextcloud.com/server/stable/go.php?to=developer-backports.

[nextcloud-desktop-bot]

AppImage file: nextcloud-PR-6838-dee6ff163c12a4ae80522d53ed0ba2adcef762cf-x86_64.AppImage

To test this change/fix you can simply download above AppImage file and test it.

Please make sure to quit your existing Nextcloud app and backup your data.

[sonarcloud[bot]]

Quality Gate failed

Failed conditions
1 New Code Smells (required ≤ 0)

See analysis details on SonarCloud

Catch issues before they fail your Quality Gate with our IDE extension SonarLint