Use 64bit versions of binaries

[steren]

gVisor is not able to run 32bit binaries. distroless images are using the 32bit version of busybox, as a consequence, images created with distroless are failing on gVisor.

[chanseokoh]

Hmm... I get the impression that BusyBox intentionally provides a single pre-compiled binary (for simplicity and manageability for example?) as they say

The "busybox-i686" version should run on both 32-bit and 64-bit x86 PCs

Technically we may be able to compile a 64-bit binary from source on our own, but I don't know if that is a good idea in terms of reliability and support. Maybe it doesn't matter much as a debug tool.

[abergmeier]

The problem is not only gVisor. We currently encounter also #225 on our Kubernetes cluster.
Which makes the debug image (of Kaniko) to a large degree unusable.
IIUC #225 should be fixed by a 64-bit build of busybox.

[chanseokoh]

Fixed by #513.