feat(s3objectlambda): open s3 access point arn

packages/@aws-cdk/aws-s3objectlambda-alpha/lib/access-point.ts

@@ -201,6 +201,12 @@ export class AccessPoint extends AccessPointBase {
    */
   public readonly accessPointCreationDate: string;
 
+  /**
+   * The ARN of the S3 access point.
+   * @attribute
+   */
+  public readonly s3AccessPointArn: string;
+
   constructor(scope: Construct, id: string, props: AccessPointProps) {
     super(scope, id, {
       physicalName: props.accessPointName,
@@ -241,6 +247,7 @@ export class AccessPoint extends AccessPointBase {
         ],
       },
     });
+    this.s3AccessPointArn = supporting.attrArn;
     this.accessPointName = accessPoint.ref;
     this.accessPointArn = accessPoint.attrArn;
     this.accessPointCreationDate = accessPoint.attrCreationDate;

packages/@aws-cdk/aws-s3objectlambda-alpha/test/s3objectlambda.test.ts

@@ -46,6 +46,9 @@ test('Can create a valid access point', () => {
       regional: false,
     }),
   });
+  new cdk.CfnOutput(stack, 'S3AccessPointArn', {
+    value: accessPoint.s3AccessPointArn,
+  });
 
   expect(Template.fromStack(stack).findOutputs('*')).toEqual(
     {
@@ -98,6 +101,14 @@ test('Can create a valid access point', () => {
           ],
         },
       },
+      S3AccessPointArn: {
+        Value: {
+          'Fn::GetAtt': [
+            'MyObjectLambdaSupportingAccessPointA2D2026E',
+            'Arn',
+          ],
+        },
+      },
       VirtualHostedRegionalUrl: {
         Value: {
           'Fn::Join': [