fix: VFolder file listing not working (#2072)

Resolves lablup/giftbox#661. This PR fixes VFolder I/O operation APIs not working when user tries to call API to a VFolder which shares name with deleted one, which is caused by `vfolder_permission_required()` decorator selecting already removed VFolder instead of live one. Adding these kind of extra filters will make the codebase coarsened, so our ultimate goal is to retire every VFolder APIs utilizing VFolder name as its key to resolve target VFolder.

**Checklist:** (if applicable)

- [x] Milestone metadata specifying the target backport version
- [x] Mention to the original issue
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changes/2072.fix.md

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+Fix VFolder file operation not working when user has been granted access to shared but deleted VFolder which has same name with the normal one