fix terraform identity resource format

Author: ms-henglu

src/TemplateRefGenerator.Tests/Files/markdown/microsoft.documentdb/2024-05-15/databaseaccounts.md

@@ -426,7 +426,7 @@ The following [Azure Verified Modules](https://aka.ms/avm) can be used to deploy
 > | Module | Description |
 > | ----- | ----- |
 > | [CosmosDB Database Account](https://github.com/Azure/bicep-registry-modules/tree/main/avm/res/document-db/database-account) | AVM Resource Module for CosmosDB Database Account |
-
+
 ### Azure Quickstart Samples
 
 The following [Azure Quickstart templates](https://aka.ms/azqst) contain Bicep samples for deploying this resource type.
@@ -880,12 +880,11 @@ To create a Microsoft.DocumentDB/databaseAccounts resource, add the following Te
 resource "azapi_resource" "symbolicname" {
   type = "Microsoft.DocumentDB/databaseAccounts@2024-05-15"
   name = "string"
-  identity = {
+  identity {
     type = "string"
-    userAssignedIdentities = {
-      {customized property} = {
-      }
-    }
+    identity_ids = = [
+      "string"
+    ]
   }
   location = "string"
   tags = {

src/TemplateRefGenerator/Generators/CodeSampleGenerator.cs

@@ -369,6 +369,17 @@ void AddProperty(string name, Action writeValue)
                     {
                         AddProperty("parent_id", () => sb.Append($"\"string\""));
                     }
+
+                    if (props.FirstOrDefault(x => x.Key == "identity") is {} identityProp && identityProp.Key != null)
+                    {
+                        props.Remove(identityProp);
+                        sb.AppendLine("identity {{");
+                        sb.AppendLine($"{propIndent}  type = \"string\"");
+                        sb.AppendLine($"{propIndent}  identity_ids = [");
+                        sb.AppendLine($"{propIndent}    \"string\"");
+                        sb.AppendLine($"{propIndent}  ]");
+                        sb.AppendLine($"{propIndent}}}");
+                    }
                 }
 
                 var bodyProps = props.Where(x => path == "" && !TerraformRootProperties.Contains(x.Key)).ToList();