Skip `GPT-J` fx tests for torch < 1.12
# What does this PR do?

After #22069, the fx tests for gpt-j with torch < 1.12 gives an error
```bash
(line 941)  AssertionError: Couldn't trace module: 'len' is not supported in symbolic tracing by default. If you want this call to be recorded, please call torch.fx.wrap('len') at module scope
```
Guess it's best to skip in this case, as it works with recent torch versions.


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