Remove strictness in export calls (#10552)

Summary:

The new PT default has been to do non-strict export for a little while now. We have explicit strict because the PT compiler team preserved the current behavior at the time, but we should be able to remove it and match the default. It might also make more models go through.

Differential Revision: D73859317

Author: mcremon-meta

backends/cadence/aot/compiler.py

@@ -88,7 +88,7 @@ def trace(
 
     # Export with dynamo
     program = torch.export.export_for_training(
-        model, inputs, strict=True
+        model, inputs
     ).run_decompositions(decomp_table)
 
     if dump_graphs: