feat: allow creation of wildcard cert from values.yaml intead of externally provided

Adam, let me know if this would be the format you'd want to allow management of your cert via BB instead of an external process

chart/templates/istio/controlplane/namespace.yaml

@@ -22,4 +22,20 @@ type: kubernetes.io/dockerconfigjson
 data:
   .dockerconfigjson: {{ template "imagePullSecret" . }}
 {{- end }}
+---
+{{- if and .Values.istio.ingress.key .Values.istio.ingress.cert }}
+apiVersion: v1
+kind: Secret
+metadata:
+  name: wildcard-cert
+  namespace: istio-system
+  labels:
+    app.kubernetes.io/name: istio-controlplane
+    app.kubernetes.io/component: "core"
+    {{- include "commonLabels" . | nindent 4}}
+type: kubernetes.io/tls
+data:
+  tls.crt: {{ .Values.istio.ingress.cert | b64enc }}
+  tls.key: {{ .Values.istio.ingress.key | b64enc}}
+{{- end }}
 {{- end }}
\ No newline at end of file