Arm backend: Fix deepcopy & require grad issues. (#20114)

Change-Id: I7a813807c0e7a2734a96c317d2f198ae489de285

cc @digantdesai @freddan80 @per @zingo @oscarandersson8218 @mansnils
@Sebastian-Larsson @robell @rascani

Signed-off-by: Michiel Olieslagers <michiel.olieslagers@arm.com>

Author: Michiel-Olieslagers

backends/arm/scripts/aot_arm_compiler.py

@@ -1034,6 +1034,7 @@ def main() -> None:  # noqa: C901
         args.calibration_data, example_inputs
     )
     model = original_model.eval()
+    model.requires_grad_(False)
 
     # export under the assumption we quantize, the exported form also works
     # in to_edge if we don't quantize
@@ -1115,8 +1116,6 @@ def main() -> None:  # noqa: C901
 
     dump_delegation_info(edge, args.intermediates)
 
-    edge_program_manager_copy = copy.deepcopy(edge)
-
     try:
         exec_prog = edge.to_executorch(
             config=ExecutorchBackendConfig(extract_delegate_segments=False)
@@ -1175,6 +1174,7 @@ def main() -> None:  # noqa: C901
     if args.bundleio or args.etrecord:
         etrecord_file_name = os.path.splitext(output_file_name)[0] + "_etrecord.bin"
         try:
+            edge_program_manager_copy = copy.deepcopy(edge)
             generate_etrecord(etrecord_file_name, edge_program_manager_copy, exec_prog)
             print(f"ETRecord saved as {etrecord_file_name}")
         except Exception as e: