Provide improved diagnostics on failed CinderX initialization

Summary: When we fail to initialize `cinderx` it's usually due to a missing symbol - but it's hard to know what that is right now. This tries to import `_cinderx` and then prints the exception so it's more actionable.

Reviewed By: yoney

Differential Revision: D92569204

fbshipit-source-id: d6f8189f3c59be09f139bdfcaee3f248803c1e5d

Author: DinoV

cinderx/PythonLib/test_cinderx/test_oss_quick.py

@@ -10,6 +10,12 @@ class CinderXOSSTest(unittest.TestCase):
     def test_import(self) -> None:
         import cinderx  # noqa: F401
 
+        if not cinderx.is_initialized():
+            try:
+                import _cinderx
+            except Exception as e:
+                print(f"Failed to import cinder: {e}")
+
         self.assertTrue(cinderx.is_initialized())