Fix for when PyTorch model trace has RecursiveScriptModules (#30430)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/30430
When a module isn't a TracedModule, attempt to get name information with `original_name` property on module and default to 'Module' when no such property exists.
Test Plan:
### Change child module to scripted module:
```
model = torchvision.models.alexnet()
model.classifier = torch.jit.script(model.classifier)
```
### Add graph
```
w = SummaryWriter()
w.add_graph(model, torch.rand((2, 3, 224, 224)))
w.close()
```
### No errors
However, graph is disconnected at parts and hard to understand.
{F223327878}
Reviewed By: sanekmelnikov
Differential Revision: D18690836
fbshipit-source-id: 42295d06b7c1d48d5401776dca1e0d12cd64b49d
