tests/CI: failing python integ tests

- failing since https://github.com/aws/aws-toolkit-vscode/commit/3626b1e208c0b41bd22454eb51905d69f403e890
- likely because of an upstream change in...
- ~~python extension~~
- https://github.com/aws/aws-sam-cli-app-templates

```
2 failing
1) SAM Integration Tests
SAM runtime: python3.8 (Image)
Starting from scratch
creates a new SAM Application (happy path):

AssertionError [ERR_ASSERTION]: Expected SAM App readme to exist at /codebuild/output/src048868088/src/github.com/aws/aws-toolkit-vscode/dist/src/testFixtures/workspaceFolder/inttestSTNKPY/python3.8/test-NH5maZ/testProject/README.md
+ expected - actual

-false
+true

at Context. (src/integrationTest/sam.test.ts:465:28)
at Generator.next ()
at fulfilled (dist/src/integrationTest/sam.test.js:9:58)

2) SAM Integration Tests
SAM runtime: python3.8 (Image)
Starting with a newly created python3.8 (Image) SAM Application...
"before all" hook for "produces an error when creating a SAM Application to the same location":

AssertionError [ERR_ASSERTION]: Expected SAM template to exist at /codebuild/output/src048868088/src/github.com/aws/aws-toolkit-vscode/dist/src/testFixtures/workspaceFolder/inttestSTNKPY/python3.8/samapp-dNEUpY/testProject/template.yaml
+ expected - actual

-false
+true

at Context. (src/integrationTest/sam.test.ts:488:28)
at Generator.next ()
at fulfilled (dist/src/integrationTest/sam.test.js:9:58)

Error: 2 tests failed.
```

## Analysis

tested locally:

```
sam init --name testProject --no-interactive --dependency-manager pip --package-type Image --base-image amazon/python3.8-base --app-template hello-world-lambda-image
```

The command succeeds and creates the expected files.

Read src/integrationTest/sam.test.ts around lines 465 and 488, then compare the CI failure with the local sam init command shown. Check the generated fixture paths and upstream SAM CLI or template behavior; done means the Python 3.8 image integration tests pass and the expected README.md and template.yaml assertions succeed.

Written by the indexing model from the issue text.