fix(aws-cdk): include nested stacks when building changesets (#17396)

This is a workaround for #5722 - users can do `cdk deploy --no-execute`
and then view the nested changesets as a way to get a full diff of
changes.


----

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

Author: rectalogic

packages/aws-cdk/lib/api/deploy-stack.ts

@@ -299,6 +299,7 @@ async function prepareAndExecuteChangeSet(
     StackName: deployName,
     ChangeSetName: changeSetName,
     ChangeSetType: update ? 'UPDATE' : 'CREATE',
+    IncludeNestedStacks: true,
     Description: `CDK Changeset for execution ${executionId}`,
     TemplateBody: bodyParameter.TemplateBody,
     TemplateURL: bodyParameter.TemplateURL,

packages/aws-cdk/test/api/deploy-stack.test.ts

@@ -164,6 +164,18 @@ test('correctly passes CFN parameters, ignoring ones with empty values', async (
   }));
 });
 
+test('correctly passes IncludeNestedStacks', async () => {
+  // WHEN
+  await deployStack({
+    ...standardDeployStackArguments(),
+  });
+
+  // THEN
+  expect(cfnMocks.createChangeSet).toHaveBeenCalledWith(expect.objectContaining({
+    IncludeNestedStacks: true,
+  }));
+});
+
 test('reuse previous parameters if requested', async () => {
   // GIVEN
   givenStackExists({