Every shim implementation needs to select a correct publisher topic when posting events, so move it out of Linux-only runc code to the place where other shims can also use it
Otherwise, shims have to copy-paste this code. For example, see runj: 8158e558a3/containerd/shim.go (L144-L172)
Signed-off-by: Marat Radchenko <marat@slonopotamus.org>
The io/ioutil package has been deprecated as of Go 1.16, see
https://golang.org/doc/go1.16#ioutil. This commit replaces the existing
io/ioutil functions with their new definitions in io and os packages.
Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>
