Repository specific list of images. (#97)

Used by CVE scanning workflows and can be used to collect images URL for airgapped setup. Script is specific for track/0.15 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 +1,15 @@
+#!/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 $REPO -type f -name metadata.yaml -exec yq '.resources | to_entries | .[] | .value | ."upstream-source"' {} \;))
+IMAGE_LIST+=($(grep image charms/katib-controller/src/suggestion.json | awk  '{print $2}' | sort --unique | sed s/\"//g))
+IMAGE_LIST+=($(grep image charms/katib-controller/src/suggestion.json | awk  '{print $2}' | sort --unique | sed s/\"//g))
+IMAGE_LIST+=($(grep image charms/katib-controller/src/enasCPUTemplate.yaml | awk  '{print $2}' | sort --unique | sed s/\"//g))
+IMAGE_LIST+=($(grep image charms/katib-controller/src/early-stopping.json | awk  '{print $2}' | sort --unique | sed s/\"//g))
+IMAGE_LIST+=($(grep image charms/katib-controller/src/defaultTrialTemplate.yaml | awk  '{print $2}' | sort --unique | sed s/\"//g))
+IMAGE_LIST+=($(grep image charms/katib-controller/src/pytorchJobTemplate.yaml | awk  '{print $2}' | sort --unique | sed s/\"//g))
+IMAGE_LIST+=($(grep image charms/katib-controller/src/metrics-collector-sidecar.json | awk  '{print $2}' | sort --unique | sed s/\"//g | sed s/,//g))
+printf "%s\n" "${IMAGE_LIST[@]}"