Remove accidentally committed test virtual environment and update .gitignore

Co-authored-by: pamelafox <297042+pamelafox@users.noreply.github.com>

Author: Copilot

.gitignore

@@ -149,3 +149,6 @@ static/
 
 # Playwright test trace
 test-results/
+
+# Test virtual environments
+test_venv*/