[Bug]: py_image_layer results in multiple shim copies

### What happened?

```
INFO: Analyzed 257 targets (2 packages loaded, 621 targets configured).
FAIL: //py/tests/py_venv_image_layer:my_app_layers_test_test (see /private/var/tmp/_bazel_arrdem/93bfea6cdc1153cc29a75400cd38823a/execroot/aspect_rules_py/bazel-out/darwin_arm64-fastbuild/testlogs/py/tests/py_venv_image_layer/my_app_layers_test_test/test.log)
INFO: From Testing //py/tests/py_venv_image_layer:my_app_layers_test_test:
==================== Test output for //py/tests/py_venv_image_layer:my_app_layers_test_test:
2514,2516c2514,2516
< - -rwxr-xr-x 0 0 0 5118056 Jan 1 2023 ./py/tests/py_venv_image_layer/my_app_bin.runfiles/aspect_rules_py/py/tests/py_venv_image_layer/.my_app_bin/bin/python
< - -rwxr-xr-x 0 0 0 5118056 Jan 1 2023 ./py/tests/py_venv_image_layer/my_app_bin.runfiles/aspect_rules_py/py/tests/py_venv_image_layer/.my_app_bin/bin/python3
< - -rwxr-xr-x 0 0 0 5118056 Jan 1 2023 ./py/tests/py_venv_image_layer/my_app_bin.runfiles/aspect_rules_py/py/tests/py_venv_image_layer/.my_app_bin/bin/python3.9
---
> - -rwxr-xr-x 0 0 0 5183072 Jan 1 2023 ./py/tests/py_venv_image_layer/my_app_bin.runfiles/aspect_rules_py/py/tests/py_venv_image_layer/.my_app_bin/bin/python
> - -rwxr-xr-x 0 0 0 5183072 Jan 1 2023 ./py/tests/py_venv_image_layer/my_app_bin.runfiles/aspect_rules_py/py/tests/py_venv_image_layer/.my_app_bin/bin/python3
> - -rwxr-xr-x 0 0 0 5183072 Jan 1 2023 ./py/tests/py_venv_image_layer/my_app_bin.runfiles/aspect_rules_py/py/tests/py_venv_image_layer/.my_app_bin/bin/python3.9
FAIL: files "py/tests/py_venv_image_layer/_my_app_layers_test.listing" and "py/tests/py_venv_image_layer/my_app_layers_listing.yaml" differ.
```

### Version

Development (host) and target OS/architectures:

Output of `bazel --version`:

Version of the Aspect rules, or other relevant rules from your
`WORKSPACE` or `MODULE.bazel` file:

Language(s) and/or frameworks involved:

### How to reproduce

```shell

```

### Any other information?

_No response_