ExecuTorch execution crashed for _log_softmax.default

### 🕵️‍♂️ Detected with [FACTO](https://github.com/meta-pytorch/FACTO)

### 🐛 Describe the bug

FACTO Generated meta_tuple:
```
['ArgType.Tensor torch.float64 (8, 5, 7)', 'ArgType.Dim 2', 'ArgType.Bool False']
```

error:
```
[op_log_softmax.cpp:157] In function opt_log_softmax_out(), assert failed (false): Unhandled out dtype 7
zsh: abort
```

### Versions

nightly

cc @larryliu0820