Add Azure MSI Redis variables for passwordless authentication

Author: raviharshicorp

variables.tf

@@ -902,3 +902,15 @@ variable "db_iam_username" {
   default     = null
   description = "The IAM username for database authentication. Required when postgres_enable_iam_auth is true."
 }
+
+variable "redis_passwordless_azure_use_msi" {
+  description = "Use Azure Managed Service Identity for Redis passwordless authentication"
+  type        = bool
+  default     = false
+}
+
+variable "redis_passwordless_azure_client_id" {
+  description = "Azure client ID for Redis passwordless authentication"
+  type        = string
+  default     = null
+}