Fix image introspect for PythonPackages

[shatakshiiii]

Related: #1582 #1580

This fixes some of the :images related issues with the given EE image:

---
version: 3

images:
  base_image:
    name: quay.io/fedora/python-311:latest

dependencies:
  ansible_core:
    package_pip: ansible-core
  ansible_runner:
    package_pip: ansible-runner
  galaxy:
    collections:
      - community.general
  python:
    - ansible-lint

• Fixes the list index out of range error, when there is no entry inside PythonPackages.
• And hence one will be able to browse the other(1-5) entries inside images command like "General Information", "System Packages" etc, even if there is no entry inside "Python Packages".