Kf 3878 feat get images script (#279)

* feat: get images script

Used by CVE scanning workflows and can be used to collect images URL for airgapped setup. Script is specific for track/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.
- Fix: typo

tools/get-images.sh

@@ -1,4 +1,4 @@
-!/bin/bash
+#!/bin/bash
 #
 # This script returns list of container images that are managed by this charm and/or its workload
 #