refactor: move all testing to top-level of repo

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

tests/local_testing/test_arize_ai.py

@@ -0,0 +1,29 @@
+import asyncio
+import logging
+import os
+import time
+
+import pytest
+from dotenv import load_dotenv
+from opentelemetry.sdk.trace.export.in_memory_span_exporter import InMemorySpanExporter
+
+import litellm
+from litellm._logging import verbose_logger
+from litellm.integrations.opentelemetry import OpenTelemetry, OpenTelemetryConfig
+
+load_dotenv()
+import logging
+
+
+@pytest.mark.asyncio()
+async def test_async_otel_callback():
+    litellm.set_verbose = True
+    litellm.success_callback = ["arize"]
+
+    await litellm.acompletion(
+        model="gpt-3.5-turbo",
+        messages=[{"role": "user", "content": "hi test from local arize"}],
+        mock_response="hello",
+        temperature=0.1,
+        user="OTEL_USER",
+    )