pdm use <python-spec> breaks if there is a file/folder named <python-spec>

[Hnasar]

To force PDM to use the python from a virtualenv, we have our CI scripts run pdm use python. Normally this worked, until we had a repo with a folder named "python". We discovered this bug after adding debug logging to PDM. As a workaround we changed it to pdm use .venv/bin/python but still, this bug should be fixed.

Steps to reproduce

0. (Remove .pdm.toml if it exists, or otherwise run git clean -xfd)
1. Create a file/folder named python
2. Create a venv: python -m venv .venv
3. Run pdm use --ignore-remembered python

Actual behavior

[NoPythonVersion]: No Python interpreter matching python is found.

Expected behavior

Using Python interpreter: .venv/bin/python (3.9)

Environment Information

> pdm info 
Virtualenv C:\Users\foo\projects\gitlab-ci\.venv is reused.
PDM version:
  2.2.1
Python Interpreter:
  C:\Users\foo\projects\gitlab-ci\.venv\Scripts\python.exe (3.11)
Project Root:
  C:/Users/foo/projects/gitlab-ci
Project Packages:
  None

> pdm info --env
{
  "implementation_name": "cpython",
  "implementation_version": "3.11.0",
  "os_name": "nt",
  "platform_machine": "AMD64",
  "platform_release": "10",
  "platform_system": "Windows",
  "platform_version": "10.0.22000",
  "python_full_version": "3.11.0",
  "platform_python_implementation": "CPython",
  "python_version": "3.11",
  "sys_platform": "win32"
}