cert-manager: upgrade from 1.12.17 to 1.17.4

Change-Id: Iea0d6eac22a57f9f1fc522e6abdd9359fbbd1415
diff --git a/charts/cert-manager/templates/extras-objects.yaml b/charts/cert-manager/templates/extras-objects.yaml
new file mode 100644
index 0000000..9ec3a7e
--- /dev/null
+++ b/charts/cert-manager/templates/extras-objects.yaml
@@ -0,0 +1,4 @@
+{{ range .Values.extraObjects }}
+---
+{{ tpl . $ }}
+{{ end }}