ARM64 container images still fail to build

[brianaydemir]

Summary

#2993 still plagues us, which is what I suppose happens when you try to implement a fix (#2992) without understanding the root cause.

The one new observation to be made here is that Python's tarfile module doesn't seem to trigger the same issue, so that should perhaps be the next, quick-and-easy workaround.

A more permanent fix will (hopefully) come in #3051, when we stop using emulation for our ARM64 builds.

Update

As it turns out, under QEMU, one can set QEMU_STRACE=1 in the environment to get strace like output. This identifies openat2 as the syscall that's been failing, which leads us to tonistiigi/binfmt#285.