Add script for caching images

[toban]

The minikube cache all command does not seem to work for me, this seems to
work though.

[tarrow]

Takes my time down from timing out to 1:41.93 when running helmfile apply to my local minikube cluster.

Of course unfortunately it spits out cache minikube deprecation warnings. I'm also slightly worried after reading the docs we might get caught by some bugs in pulling new images (particularly after we starting using mutable rather than unique tags) see: kubernetes/minikube#10060

I'm torn but I suspect we don't actually want to merge this for this reason.

[toban]

Takes my time down from timing out to 1:41.93 when running helmfile apply to my local minikube cluster.

Of course unfortunately it spits out cache minikube deprecation warnings. I'm also slightly worried after reading the docs we might get caught by some bugs in pulling new images (particularly after we starting using mutable rather than unique tags) see: kubernetes/minikube#10060

I'm torn but I suspect we don't actually want to merge this for this reason.

This has worked great for me for the almost two weeks using it, i guess these problems might manifest themselves later.