feat(appsync): add maxBatchSize property to the AppSyncFunction C…

…onstruct (#30266)

### Issue # (if applicable)

N/A

### Reason for this change
Missing property in the Construct.

https://docs.aws.amazon.com/ja_jp/AWSCloudFormation/latest/UserGuide/aws-resource-appsync-functionconfiguration.html#cfn-appsync-functionconfiguration-maxbatchsize



### Description of changes
Add `maxBatchSize` property to the `AppSyncFunction` Construct




### Description of how you validated changes
Add unit tests and integ tests.


### Checklist
- [x] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

packages/@aws-cdk-testing/framework-integ/test/aws-appsync/test/integ.appsync-function-max-batch-size.js.snapshot/aws-cdk-appsync-function-max-batch-size.template.json

@@ -0,0 +1,229 @@
+{
+ "Resources": {
+  "LambdaAPID6A5A92B": {
+   "Type": "AWS::AppSync::GraphQLApi",
+   "Properties": {
+    "AuthenticationType": "API_KEY",
+    "Name": "LambdaAPI"
+   }
+  },
+  "LambdaAPISchemaCC5CA3D2": {
+   "Type": "AWS::AppSync::GraphQLSchema",
+   "Properties": {
+    "ApiId": {
+     "Fn::GetAtt": [
+      "LambdaAPID6A5A92B",
+      "ApiId"
+     ]
+    },
+    "Definition": "schema {\n    query: Query\n    mutation: Mutation\n}\n\ntype Query {\n    getPost(id:ID!): Post\n    allPosts: [Post]\n}\n\ntype Mutation {\n    addPost(id: ID!, author: String!, title: String, content: String, url: String): Post!\n}\n\ntype Post {\n    id: ID!\n    author: String!\n    title: String\n    content: String\n    url: String\n    ups: Int\n    downs: Int\n    relatedPosts: [Post]\n    relatedPostsMaxBatchSize: [Post]\n}"
+   }
+  },
+  "LambdaAPIDefaultApiKey15F6897D": {
+   "Type": "AWS::AppSync::ApiKey",
+   "Properties": {
+    "ApiId": {
+     "Fn::GetAtt": [
+      "LambdaAPID6A5A92B",
+      "ApiId"
+     ]
+    }
+   },
+   "DependsOn": [
+    "LambdaAPISchemaCC5CA3D2"
+   ]
+  },
+  "LambdaAPILambdaDSServiceRole21CACDF8": {
+   "Type": "AWS::IAM::Role",
+   "Properties": {
+    "AssumeRolePolicyDocument": {
+     "Statement": [
+      {
+       "Action": "sts:AssumeRole",
+       "Effect": "Allow",
+       "Principal": {
+        "Service": "appsync.amazonaws.com"
+       }
+      }
+     ],
+     "Version": "2012-10-17"
+    }
+   }
+  },
+  "LambdaAPILambdaDSServiceRoleDefaultPolicyFB1B9CE8": {
+   "Type": "AWS::IAM::Policy",
+   "Properties": {
+    "PolicyDocument": {
+     "Statement": [
+      {
+       "Action": "lambda:InvokeFunction",
+       "Effect": "Allow",
+       "Resource": [
+        {
+         "Fn::GetAtt": [
+          "funcC3A0C2E2",
+          "Arn"
+         ]
+        },
+        {
+         "Fn::Join": [
+          "",
+          [
+           {
+            "Fn::GetAtt": [
+             "funcC3A0C2E2",
+             "Arn"
+            ]
+           },
+           ":*"
+          ]
+         ]
+        }
+       ]
+      }
+     ],
+     "Version": "2012-10-17"
+    },
+    "PolicyName": "LambdaAPILambdaDSServiceRoleDefaultPolicyFB1B9CE8",
+    "Roles": [
+     {
+      "Ref": "LambdaAPILambdaDSServiceRole21CACDF8"
+     }
+    ]
+   }
+  },
+  "LambdaAPILambdaDSFD6DF39B": {
+   "Type": "AWS::AppSync::DataSource",
+   "Properties": {
+    "ApiId": {
+     "Fn::GetAtt": [
+      "LambdaAPID6A5A92B",
+      "ApiId"
+     ]
+    },
+    "LambdaConfig": {
+     "LambdaFunctionArn": {
+      "Fn::GetAtt": [
+       "funcC3A0C2E2",
+       "Arn"
+      ]
+     }
+    },
+    "Name": "LambdaDS",
+    "ServiceRoleArn": {
+     "Fn::GetAtt": [
+      "LambdaAPILambdaDSServiceRole21CACDF8",
+      "Arn"
+     ]
+    },
+    "Type": "AWS_LAMBDA"
+   }
+  },
+  "LambdaAPITestFunction64FA697F": {
+   "Type": "AWS::AppSync::FunctionConfiguration",
+   "Properties": {
+    "ApiId": {
+     "Fn::GetAtt": [
+      "LambdaAPID6A5A92B",
+      "ApiId"
+     ]
+    },
+    "DataSourceName": "LambdaDS",
+    "FunctionVersion": "2018-05-29",
+    "MaxBatchSize": 10,
+    "Name": "test"
+   },
+   "DependsOn": [
+    "LambdaAPILambdaDSFD6DF39B",
+    "LambdaAPISchemaCC5CA3D2"
+   ]
+  },
+  "funcServiceRoleA96CCB44": {
+   "Type": "AWS::IAM::Role",
+   "Properties": {
+    "AssumeRolePolicyDocument": {
+     "Statement": [
+      {
+       "Action": "sts:AssumeRole",
+       "Effect": "Allow",
+       "Principal": {
+        "Service": "lambda.amazonaws.com"
+       }
+      }
+     ],
+     "Version": "2012-10-17"
+    },
+    "ManagedPolicyArns": [
+     {
+      "Fn::Join": [
+       "",
+       [
+        "arn:",
+        {
+         "Ref": "AWS::Partition"
+        },
+        ":iam::aws:policy/service-role/AWSLambdaBasicExecutionRole"
+       ]
+      ]
+     }
+    ]
+   }
+  },
+  "funcC3A0C2E2": {
+   "Type": "AWS::Lambda::Function",
+   "Properties": {
+    "Code": {
+     "S3Bucket": {
+      "Fn::Sub": "cdk-hnb659fds-assets-${AWS::AccountId}-${AWS::Region}"
+     },
+     "S3Key": "df9f207d681056c35badb6bc0d60a945b44c887b227b759715fd6a6443486443.zip"
+    },
+    "Handler": "lambda-tutorial.handler",
+    "Role": {
+     "Fn::GetAtt": [
+      "funcServiceRoleA96CCB44",
+      "Arn"
+     ]
+    },
+    "Runtime": "nodejs18.x"
+   },
+   "DependsOn": [
+    "funcServiceRoleA96CCB44"
+   ]
+  }
+ },
+ "Parameters": {
+  "BootstrapVersion": {
+   "Type": "AWS::SSM::Parameter::Value<String>",
+   "Default": "/cdk-bootstrap/hnb659fds/version",
+   "Description": "Version of the CDK Bootstrap resources in this environment, automatically retrieved from SSM Parameter Store. [cdk:skip]"
+  }
+ },
+ "Rules": {
+  "CheckBootstrapVersion": {
+   "Assertions": [
+    {
+     "Assert": {
+      "Fn::Not": [
+       {
+        "Fn::Contains": [
+         [
+          "1",
+          "2",
+          "3",
+          "4",
+          "5"
+         ],
+         {
+          "Ref": "BootstrapVersion"
+         }
+        ]
+       }
+      ]
+     },
+     "AssertDescription": "CDK bootstrap stack version 6 required. Please run 'cdk bootstrap' with a recent version of the CDK CLI."
+    }
+   ]
+  }
+ }
+}