Fallback to deepcopy when fake program fails

Summary:
Catch the general Exception case, not only AssertionError.

D55047794 caused an error with QC: #2531

Reviewed By: cccclai

Differential Revision: D55204315

fbshipit-source-id: 35df9d74bd55d329cbcab03e5c70e289b45796db

Author: lucylq

exir/backend/backend_api.py

@@ -351,8 +351,10 @@ def to_backend(
     # Fall back to deepcopy if no fake mode is found. TODO(T182910699): Remove this fallback.
     try:
         fake_edge_program = get_fake_program(edge_program)
-    except AssertionError as e:
-        logging.warning(f"No fake mode found for {edge_program.graph_module}: {e}")
+    except Exception as e:
+        logging.warning(
+            f"Error in get_fake_program for graph {edge_program.graph_module}, fallback to deepcopy: {e}"
+        )
         fake_edge_program = copy.deepcopy(edge_program)
     partitioner_result = partitioner_instance(fake_edge_program)
     tagged_exported_program = partitioner_result.tagged_exported_program