de-hardcode list of extra images for image-cache test

[smira]

For k8s conformance: https://github.com/kubernetes-sigs/hydrophone/blob/e8a92aa05a29928d34cfcec7475f1cac074eef86/cmd/root.go#L75

For our images - could use e.g. constants

[smira]

For e2e images:

$ docker run --entrypoint /usr/local/bin/e2e.test registry.k8s.io/conformance:v1.32.0 --list-images
registry.k8s.io/e2e-test-images/httpd:2.4.38-4
registry.k8s.io/sig-storage/volume-data-source-validator:v1.0.0
registry.k8s.io/sig-storage/csi-attacher:v4.7.0
registry.k8s.io/cloud-provider-gcp/gcp-compute-persistent-disk-csi-driver:v1.2.2
gcr.io/authenticated-image-pulling/windows-nanoserver:v1
registry.k8s.io/e2e-test-images/sample-apiserver:1.29.2
registry.k8s.io/e2e-test-images/busybox:1.36.1-1
registry.k8s.io/e2e-test-images/nonewprivs:1.3
registry.k8s.io/e2e-test-images/perl:5.26
registry.k8s.io/e2e-test-images/regression-issue-74839:1.2
registry.k8s.io/e2e-test-images/volume/iscsi:2.6
registry.k8s.io/sig-storage/csi-provisioner:v5.0.1
registry.k8s.io/e2e-test-images/agnhost:2.53
gcr.io/k8s-authenticated-test/agnhost:2.6
registry.k8s.io/e2e-test-images/nginx:1.15-4
registry.k8s.io/sig-storage/csi-resizer:v1.11.1
registry.k8s.io/e2e-test-images/resource-consumer:1.13
registry.k8s.io/sig-storage/csi-snapshotter:v8.1.0
registry.k8s.io/sig-storage/csi-node-driver-registrar:v2.5.1
registry.k8s.io/e2e-test-images/kitten:1.7
registry.k8s.io/sig-storage/nfs-provisioner:v4.0.8
registry.k8s.io/e2e-test-images/node-perf/npb-ep:1.2
registry.k8s.io/e2e-test-images/node-perf/npb-is:1.2
registry.k8s.io/e2e-test-images/node-perf/tf-wide-deep:1.3
registry.k8s.io/pause:3.10
registry.k8s.io/e2e-test-images/redis:5.0.5-3
registry.k8s.io/sig-storage/livenessprobe:v2.14.0
gcr.io/authenticated-image-pulling/alpine:3.7
registry.k8s.io/build-image/distroless-iptables:v0.6.5
registry.k8s.io/e2e-test-images/httpd:2.4.39-4
registry.k8s.io/e2e-test-images/volume/nfs:1.4
registry.k8s.io/sig-storage/csi-node-driver-registrar:v2.10.1
registry.k8s.io/sig-storage/csi-provisioner:v5.1.0
registry.k8s.io/cloud-provider-gcp/gcp-compute-persistent-disk-csi-driver:v1.4.0
registry.k8s.io/e2e-test-images/busybox:1.29-2
registry.k8s.io/etcd:3.5.16-0
registry.k8s.io/e2e-test-images/ipc-utils:1.3
registry.k8s.io/e2e-test-images/jessie-dnsutils:1.7
registry.k8s.io/sig-storage/livenessprobe:v2.12.0
registry.k8s.io/sig-storage/csi-snapshotter:v8.0.1
invalid.registry.k8s.io/invalid/alpine:3.1
registry.k8s.io/e2e-test-images/nautilus:1.7
registry.k8s.io/sig-storage/hello-populator:v1.0.1
registry.k8s.io/sig-storage/csi-external-health-monitor-controller:v0.12.1
registry.k8s.io/sig-storage/csi-attacher:v4.6.1
registry.k8s.io/sig-storage/csi-node-driver-registrar:v2.12.0
registry.k8s.io/e2e-test-images/apparmor-loader:1.4
registry.k8s.io/e2e-test-images/nginx:1.14-4
registry.k8s.io/e2e-test-images/nonroot:1.4
registry.k8s.io/sig-storage/hostpathplugin:v1.14.0
registry.k8s.io/sig-storage/csi-resizer:v1.12.0
registry.k8s.io/sig-storage/hostpathplugin:v1.15.0