poc: refactor: tests/console/commands/test_show.py

[chadac]

I noticed this file had a lot of repeated code due to the need to manually specify each lock file. Added a few methods to drop this down from 1.9k to about 896 LOC, while keeping the tests readable. Putting this up as a POC since I'd love feedback on what can be improved/dropped/maybe the refactor isn't needed in the first place :) I can break it out into multiple PRs for merging

Changes:

• Move common packages (cachy, pendulum, pytest) into fixtures
• Merged some test functions using pytest.mark.parametrize
• Add mock_lock_data, for building the lockfile based on a list of packages. This cut down most of the repeated code, and helped catch a couple errors (such as a mistaken package dependency added in test_show_tree_why_package that led to no functional difference)
• Extend get_package to include category and description
• Add mock_poetry_dependency to capture the common pattern of having Poetry depend on package X and no version earlier.

Pull Request Check List

Resolves: N/A

• [x] Added tests for changed code.
• [ ] Updated documentation for changed code.