fix(lambda): unreliable lambda test (aws#8235)

## Problem

<img width="2353" height="362" alt="image"
src="https://github.com/user-attachments/assets/4d98944f-8d7a-4dcd-98d2-8dd0e9fb1891"
/>

## Solution

- Skipping this test for now. Lambda team will work on a fix and
reenable this soon.
---

- Treat all work as PUBLIC. Private `feature/x` branches will not be
squash-merged at release time.
- Your code changes must meet the guidelines in
[CONTRIBUTING.md](https://github.com/aws/aws-toolkit-vscode/blob/master/CONTRIBUTING.md#guidelines).
- License: I confirm that my contribution is made under the terms of the
Apache 2.0 license.

Author: laileni-aws

packages/core/src/test/awsService/appBuilder/walkthrough.test.ts

@@ -223,7 +223,7 @@ describe('AppBuilder Walkthrough', function () {
                     assert.notEqual(await fs.readFileText(vscode.Uri.joinPath(workspaceUri, 'template.yaml')), prevInfo)
                 })
 
-                it('download serverlessland proj', async function () {
+                it.skip('download serverlessland proj', async function () {
                     // When
                     await genWalkthroughProject('API', workspaceUri, 'python')
                     // Then template should be overwritten