Environment discovery experiment is discovering python.exe that directs to Windows store

[luabud]

Environment data

• VS Code version: 1.53.0
• Extension version (available under the Extensions sidebar): latest insiders
• OS and version: Windows 10
• Python version (& distribution if applicable, e.g. Anaconda): N/A
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): N/A
• Relevant/affected Python packages and their versions: N/A
• Relevant/affected Python-related VS Code extensions and their versions: N/A
• Value of the python.languageServer setting: N/A

[NOTE: If you suspect that your issue is related to the Microsoft Python Language Server (python.languageServer: 'Microsoft'), please download our new language server Pylance from the VS Code marketplace to see if that fixes your issue]

Expected behaviour

In a Windows machine where there's no Python installed, we should prompt users with the "Python is not installed" notification.

Actual behaviour

In a Windows machine where there's no Python installed, the extension is discovering and selecting the python.exe at ~\AppData\Local\Microsoft\WindowsApps. From what I understand, this executable comes with Windows and it's meant to open the Windows store when Python is not installed (or not on PATH actually, I believe). We should not be displaying it as an option to be selected in the workspace.

Steps to reproduce:

[NOTE: Self-contained, minimal reproducing code samples are extremely helpful and will expedite addressing your issue]

1. Create a blank VM on Azure with a Windows 10 image
2. Install VS Code
3. Open user settings.json and opt in the new discovery experiment:

    "python.experiments.optInto": [
        "pythonDiscoveryModule"
    ],

4. Install the Python extension
5. Create a Python file
6. See that an interpreter was selected. If you add a print("hello world") and click the run button, you'll see it will not execute the file, as the executable is not an actual interpreter.