Feature request: [containers.init] can use more than one path

Because not all distributions have /usr/libexec(example: Arch), and some system administrators may want /usr/local/libexec to have a higher priority

Configuration format assumptions:

[containers]
init = [
  "/usr/local/libexec/podman/catatonit",
  "/usr/local/lib/podman/catatonit",
  "/usr/libexec/podman/catatonit",
  "/usr/lib/podman/catatonit",
  "/usr/local/sbin/catatonit",
  "/usr/local/bin/catatonit",
  "/usr/sbin/catatonit",
  "/usr/bin/catatonit"
]