feat(appconfig): add atDeploymentTick extension action point to L2 Constructs (#32490)

### Issue # (if applicable)

Not Applicable

### Reason for this change

Missing feature for AppConfig Extension Action Point

### Description of changes

Added feature and unit tests. Updated Integration tests.

### Description of how you validated changes

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*

Author: cpaluch-aws

packages/@aws-cdk-testing/framework-integ/test/aws-appconfig/test/integ.extension.js.snapshot/aws-appconfig-extension.assets.json

@@ -318,6 +318,23 @@
         ]
        }
       }
+     ],
+     "AT_DEPLOYMENT_TICK": [
+      {
+       "Name": "awsappconfigextension-MyLambdaExtension-68C15290-0",
+       "Uri": {
+        "Fn::GetAtt": [
+         "MyFunction3BAA72D1",
+         "Arn"
+        ]
+       },
+       "RoleArn": {
+        "Fn::GetAtt": [
+         "MyLambdaExtensionRoleBC958D3F13B04",
+         "Arn"
+        ]
+       }
+      }
      ]
     },
     "Name": "awsappconfigextension-MyLambdaExtension-68C15290"

packages/@aws-cdk-testing/framework-integ/test/aws-appconfig/test/integ.extension.js.snapshot/aws-appconfig-extension.template.json

@@ -39,6 +39,7 @@ const lambdaExtension = new Extension(stack, 'MyLambdaExtension', {
       actionPoints: [
         ActionPoint.PRE_CREATE_HOSTED_CONFIGURATION_VERSION,
         ActionPoint.ON_DEPLOYMENT_START,
+        ActionPoint.AT_DEPLOYMENT_TICK,
       ],
       eventDestination: new LambdaDestination(lambda),
     }),

packages/@aws-cdk-testing/framework-integ/test/aws-appconfig/test/integ.extension.js.snapshot/awsappconfigextensionMyApplicationappconfigextensionDefaultTestDeployAssert64BA6C4E.assets.json

@@ -536,9 +536,22 @@ new appconfig.SourcedConfiguration(this, 'MySourcedConfiguration', {
 ## Extension
 
 An extension augments your ability to inject logic or behavior at different points during the AWS AppConfig workflow of
-creating or deploying a configuration.
+creating or deploying a configuration. You can associate these types of tasks with AWS AppConfig applications, environments, and configuration profiles.
 See: https://docs.aws.amazon.com/appconfig/latest/userguide/working-with-appconfig-extensions.html
 
+An extension defines one or more actions, that it performs during an AWS AppConfig workflow. Each action is invoked either when you interact with AWS AppConfig or when AWS AppConfig is performing a process on your behalf. These invocation points are called action points. AWS AppConfig extensions support the following action points: 
+
+* PRE_START_DEPLOYMENT
+* PRE_CREATE_HOSTED_CONFIGURATION_VERSION
+* ON_DEPLOYMENT_START
+* ON_DEPLOYMENT_STEP
+* ON_DEPLOYMENT_BAKING
+* ON_DEPLOYMENT_COMPLETE
+* ON_DEPLOYMENT_ROLLED_BACK
+* AT_DEPLOYMENT_TICK
+
+See: https://docs.aws.amazon.com/appconfig/latest/userguide/working-with-appconfig-extensions-about.html
+
 ### AWS Lambda destination
 
 Use an AWS Lambda as the event destination for an extension.

packages/@aws-cdk-testing/framework-integ/test/aws-appconfig/test/integ.extension.js.snapshot/cdk.out

@@ -146,6 +146,15 @@ export interface IApplication extends cdk.IResource {
    */
   onDeploymentRolledBack(eventDestination: IEventDestination, options?: ExtensionOptions): void;
 
+  /**
+   * Adds an AT_DEPLOYMENT_TICK extension with the provided event destination and
+   * also creates an extension association to an application.
+   *
+   * @param eventDestination The event that occurs during the extension
+   * @param options Options for the extension
+   */
+  atDeploymentTick(eventDestination: IEventDestination, options?: ExtensionOptions): void;
+
   /**
    * Adds an extension association to the application.
    *
@@ -297,6 +306,17 @@ abstract class ApplicationBase extends cdk.Resource implements IApplication, IEx
     this.extensible.onDeploymentRolledBack(eventDestination, options);
   }
 
+  /**
+   * Adds an AT_DEPLOYMENT_TICK extension with the provided event destination and
+   * also creates an extension association to an application.
+   *
+   * @param eventDestination The event that occurs during the extension
+   * @param options Options for the extension
+   */
+  public atDeploymentTick(eventDestination: IEventDestination, options?: ExtensionOptions) {
+    this.extensible.atDeploymentTick(eventDestination, options);
+  }
+
   /**
    * Adds an extension association to the application.
    *