bug: Python 3.8 raises exceptions around AST

### cli command

az partnercenter marketplace offer list

### Extension version

0.2.4

### Describe the bug

The import from ast fails. if that's removed, the

### To reproduce

setup a virtual environment with 3.8.

### Code snippet

_No response_

### Relevant log output

_No response_

Reproduce `az partnercenter marketplace offer list` in a Python 3.8 virtual environment using extension version 0.2.4, then locate the AST import used by this command. The issue is incomplete, so confirm the exact exception and affected entry point before changing anything. Done means the command runs without the reported import-related exception on Python 3.8.

Written by the indexing model from the issue text.