Resolve "Add istio mTLS for Grafana Alloy"

General MR

Summary

Add istio mTLS for Grafana Alloy

Relevant logs/screenshots

(Include any relevant logs/screenshots)

Linked Issue

issue

Upgrade Notices

N/A

Closes #13 (closed)

chart/templates/bigbang/istio/peerauthentications/peerAuthentication.yaml

+{{- if .Values.istio.enabled  }}
+apiVersion: security.istio.io/v1beta1
+kind: PeerAuthentication
+metadata:
+  name: default-{{ .Release.Name }}
+  namespace: {{ .Release.Namespace }}
+spec:
+  mtls:
+    mode: {{ .Values.istio.mtls.mode }}
+{{- end }}