copyFileContent broken on zfs (in some cases)

[codyps]

See moby/moby#41866

Basically, need to add EINVAL on this line:

fsutil/copy/copy_linux.go

Line 92 in 0834f99

if (err != unix.ENOSYS && err != unix.EXDEV && err != unix.EPERM) || !first {

Also worth considering if any error should cause the fallback.

I haven't isolated the kernel version/zfs version that causes the issue. My kernel & zfs version are posted in the moby ticket linked above.

There's also an identical issue in containerd/continuity: containerd/continuity#176

[tonistiigi]

@jmesmon Send the patches to the affected repos. Match the behavior/argumentation to https://github.com/golang/go/blob/5f646f0a984d43a2e9e99a1338145a862fef425e/src/internal/poll/copy_file_range_linux.go#L90-L112