fix: remove caching from CI test workflow

[briangreunke]

Remove caching from CI test workflow

Caching was causing non-deterministic typing errors between the different versions of Python

Key Changes:

• removed virtual env caching in the test workflow

Removed:

• Removed the caching of virtual env

---

Generated Summary:

• Removed caching of dependencies in GitHub Actions workflow.
• Caching previously utilized .venv directory to improve package install speed.
• Potential impact: Slight increase in install time for dependencies, as caching will no longer be used.
• Adjusts workflow to focus solely on the installation step with Poetry.

This summary was generated with ❤️ by rigging