Avoid using .view(dtype) because ExecuTorch doesn't have that op (#386)

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Author: larryliu0820

quantize.py

@@ -688,7 +688,7 @@ def forward(self, indices: torch.Tensor) -> torch.Tensor:
             weight_odd = self.weight.remainder(16)
             weight_unpacked = torch.stack((weight_even, weight_odd), dim=-1)
             weight = weight_unpacked.view(self.weight.shape[0], -1)
-            weight = weight.view(torch.int8).add(-8)
+            weight = weight.to(torch.int8).add(-8)
         else:
             weight = self.weight