Pin integration test image for alpine
Pin integration test image for alpine

The latest tag is no longer available for alpine, pin
to the latest version rather than using latest

Signed-off-by: Derek McGowan <e1c79a582b6629e6b39e9679f4bb964d25db4aa8@mcg.dev>

containerd/containerd,mikebrow/containerd,thaJeztah/containerd,mikebrow/containerd,dmcgowan/containerd,estesp/containerd,estesp/containerd,thaJeztah/containerd,vdemeester/containerd,containerd/containerd,dmcgowan/containerd,vdemeester/containerd