refactor: move all testing to top-level of repo

Closes https://github.com/BerriAI/litellm/issues/486

tests/local_testing/test_get_model_file.py

@@ -0,0 +1,12 @@
+import os, sys, traceback
+
+sys.path.insert(
+    0, os.path.abspath("../..")
+)  # Adds the parent directory to the system path
+import litellm
+import pytest
+
+try:
+    print(litellm.get_model_cost_map(url="fake-url"))
+except Exception as e:
+    pytest.fail(f"An exception occurred: {e}")