Add HardTanh to RemovePermutesAroundElementwiseOps (#6992)

Summary:

This diff adds `hardtanh` to the list of elementwise ops that we consider for permute elimination.

- Fixing logging issue in summary dump that results in some delegate size metrics being reported incorrectly.

Reviewed By: zonglinpeng

Differential Revision: D66187338

Author: Vysarat

backends/cadence/aot/remove_ops.py

@@ -561,6 +561,7 @@ class Subgraph:
         exir_ops.edge.aten.mul.Tensor,
         exir_ops.edge.aten.mean.dim,
         exir_ops.edge.aten.cat.default,
+        exir_ops.edge.aten.hardtanh.default,
         exir_ops.edge.quantized_decomposed.quantize_per_tensor.default,
         exir_ops.edge.quantized_decomposed.dequantize_per_tensor.default,
     }