fix: adds missing script file

hack/addons/add-warning-helm-configmap.sh

@@ -0,0 +1,20 @@
+
+set -euo pipefail
+IFS=$'\n\t'
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+readonly SCRIPT_DIR
+
+# shellcheck source=hack/common.sh
+source "${SCRIPT_DIR}/../common.sh"
+
+# add warning not to edit file directly
+cat <<EOF >"${GIT_REPO_ROOT}/charts/cluster-api-runtime-extensions-nutanix/templates/helm-config.yaml"
+$(cat "${GIT_REPO_ROOT}/hack/license-header.yaml.txt")
+
+#=================================================================
+#                 DO NOT EDIT THIS FILE
+#  IT HAS BEEN GENERATED BY /hack/tools/helm-cm/main.go
+#=================================================================
+$(cat "${GIT_REPO_ROOT}/charts/cluster-api-runtime-extensions-nutanix/templates/helm-config.yaml")
+EOF