Temporally disable Terminal REPL shell integration for Python3.13

[anthonykim1]

Related: microsoft/vscode#232420
Before getting upstream fix in from cpython, we should temporally disable shell integration in Python terminal REPL as it leads to awkward cursor positioning in user's Python terminal REPL>

[anthonykim1]

Verification steps:

1. Make sure you have Python3.13 installed on your local machine
2. Install pre-release version of Python extension
3. type 'python' or other way to trigger your python3.13 executable in terminal
4. Make sure you dont see signs of shell integration in terminal Python REPL (such as blue or red decorations).