kind.sh: Retry pulling docker registry image
kind.sh: Retry pulling docker registry image

ci-datapath fails fairly regularly with this error trying to pull registry:2 image:

    docker: Error response from daemon: Get "https://registry-1.docker.io/v2/":
    net/http: request canceled while waiting for connection (Client.Timeout
    exceeded while awaiting headers).

This commit modifies kind.sh to retry pulling the registry image.

Signed-off-by: Michi Mutsuzaki <a75494f12f73453b2bd75573f87b8f21fcc50565@isovalent.com>

cilium/cilium,cilium/cilium,cilium/cilium,cilium/cilium,cilium/cilium