opentelemetry-util-genai: skip flaky upload test on pypy (open-telemetry#3918)

* opentelemetry-util-genai: skip flaky upload test on pypy

* Update util/opentelemetry-util-genai/tests/test_upload.py

Co-authored-by: Aaron Abbott <[email protected]>

---------

Co-authored-by: Aaron Abbott <[email protected]>

Author: xrmx

util/opentelemetry-util-genai/tests/test_upload.py

@@ -20,8 +20,9 @@
 import threading
 import time
 from contextlib import contextmanager
+from platform import python_implementation
 from typing import Any
-from unittest import TestCase
+from unittest import TestCase, skipIf
 from unittest.mock import ANY, MagicMock, patch
 
 import fsspec
@@ -148,6 +149,9 @@ def blocked_upload(*args: Any, **kwargs: Any):
     def test_shutdown_no_items(self):
         self.hook.shutdown()
 
+    @skipIf(
+        python_implementation().lower() == "pypy", "fails randomly on pypy: https://github.com/open-telemetry/opentelemetry-python-contrib/issues/3812"
+    )
     def test_upload_then_shutdown(self):
         self.hook.on_completion(
             inputs=FAKE_INPUTS,