Check if we still need projects/mmdebstrap-image/mmdebstrap-no-user-ns.patch with more recent versions of mmdebstrap

It seems that this commit would allow us to remove our patch projects/mmdebstrap-image/mmdebstrap-no-user-ns.patch: boklm/mmdebstrap@46930341

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information