feat: updated get images script (#131)

Used by CVE scanning workflows and can be used to collect images URL for airgapped setup. Script is specific for track/ckf-1.7 branch to capture all images for that branch. Branch is handled in kubeflow-ci and bundle automation using bundle file.

Summary of changes:
- Re-designed get images script to retrieve all images for current branch. Branch management is done outside of this script.

tools/get-images.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+#
+# This script returns list of container images that are managed by this charm and/or its workload
+#
+# dynamic list
+IMAGE_LIST=()
+IMAGE_LIST+=($(find -type f -name metadata.yaml -exec yq '.resources | to_entries | .[] | .value | ."upstream-source"' {} \;))
+printf "%s\n" "${IMAGE_LIST[@]}"
+