Template AzureIdentityBinding using $(AZ_IDENTITY_NAME) for integrations

Signed-off-by: leigh capili <leigh@null.net>

manifests/integrations/registry-credentials-sync/azure/az-identity.yaml

@@ -5,3 +5,12 @@ kind: AzureIdentity
 metadata:
   name: credentials-sync  # if this is changed, also change in config-patches.yaml
   namespace: flux-system
+---
+apiVersion: aadpodidentity.k8s.io/v1
+kind: AzureIdentityBinding
+metadata:
+  name: credentials-sync  # this can have a different name, but it's nice to keep them the same
+  namespace: flux-system
+spec:
+  azureIdentity: $(AZ_IDENTITY_NAME) # match the AzureIdentity name
+  selector: $(AZ_IDENTITY_NAME) # match the AzureIdentity name

manifests/integrations/registry-credentials-sync/azure/kustomizeconfig.yaml

@@ -1,3 +1,7 @@
 varReference:
 - path: spec/template/metadata/labels
   kind: Deployment
+- path: spec/azureIdentity
+  kind: AzureIdentityBinding
+- path: spec/selector
+  kind: AzureIdentityBinding