run env: replace lsblk with hd_list but fix it up a bit

run env: replace lsblk with hd_list but fix it up a bit

Instead of lsblk we use the original `hd_list` to be closer
to what we originally had.
However, from the PVE codebase I copied over the use of the
`E: DEVNAME` property to find the `/dev` node like (since
some weird devices can have '!' in /sys with '/' in /dev),
drop the check for `/sys/block/$d/dev`, and provide both the
`/dev` and `/sys/block` path in the output array.

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>