OZG-3328 use run_helm_test.sh in Jenkinsfile

Jenkinsfile

@@ -160,9 +160,7 @@ pipeline {
                     HELM_CHART_VERSION = generateHelmChartVersion()
 
                     dir('src/main/helm') {
-                        sh "helm lint -f ../../test/linter-values.yaml"
-
-                        sh "helm unittest --helm3 -f '../../test/helm/*.yaml' -v '../../test/unit-values.yaml' ."
+                        sh "./run_helm_test.sh"
 
                         sh "helm package --version=${HELM_CHART_VERSION} ."