Incompatibility with torchao >= 0.17.0 due to hardcoded legacy import paths in torchao_quantizer.py

### Describe the bug

In src/diffusers/quantizers/torchao/torchao_quantizer.py (lines 99-102), the imports inside _update_torch_safe_globals() are hardcoded to legacy torchao paths: Pythonfrom torchao.dtypes import NF4Tensor
from torchao.dtypes.uintx.uintx_layout import UintxAQTTensorImpl, UintxTensor
Starting from torchao >= 0.17.0 (and 0.18.0), these modules were refactored/relocated:UintxTensor / UintxAQTTensorImpl moved to torchao.prototype.dtypesNF4Tensor moved to torchao.quantizationImporting Diffusers with torchao >= 0.17.0 installed leads to ModuleNotFoundError / ImportError.

### Reproduction

Proposed Fix
Wrap the imports in try-except fallback blocks inside _update_torch_safe_globals():
Python
safe_globals = []

> # 1. NF4Tensor fallback
>
>
> try:
> from torchao.dtypes import NF4Tensor
> safe_globals.append(NF4Tensor)
> except ImportError:
> try:
> from torchao.quantization import NF4Tensor
> safe_globals.append(NF4Tensor)
> except ImportError:
> pass

> # 2. UintxTensor fallback
>
>
> try:
> from torchao.dtypes.uintx.uintx_layout import UintxAQTTensorImpl, UintxTensor
> safe_globals.extend([UintxTensor, UintxAQTTensorImpl])
> except ImportError:
> try:
> from torchao.prototype.dtypes import UintxAQTTensorImpl, UintxTensor
> safe_globals.extend([UintxTensor, UintxAQTTensorImpl])
> except ImportError:
> pass

> if safe_globals:
> torch.serialization.add_safe_globals(safe_globals=safe_globals)

### Logs

```shell

```

### System Info

py 3.13 win11

### Who can help?

_No response_

Inizia da src/diffusers/quantizers/torchao/torchao_quantizer.py, concentrandoti su _update_torch_safe_globals() e sui relativi imports. Riproduci il problema con torchao 0.17.0 o versioni successive, quindi verifica che i percorsi legacy e ricollocati siano gestiti senza errori di importazione e che le classi tensor disponibili siano registrate come safe globals.

Scritto dal modello di indicizzazione a partire dal testo della issue.