Backport #22759 by @KN4CK3R
related #16865
This PR adds an accessibility check before mounting container blobs.
Co-authored-by: KN4CK3R <admin@oldschoolhack.me>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
Co-authored-by: silverwind <me@silverwind.io>