Bugs in PixArtImageProcessor.resize_and_crop_tensor

### Describe the bug

`PixArtImageProcessor.resize_and_crop_tensor` returns image with incorrect size

### Reproduction

```python
import torch
from diffusers.image_processor import PixArtImageProcessor

orig_height, orig_width = (832, 1152)
new_height, new_width = (960, 1280)

image = torch.rand((1, 3, orig_height, orig_width))
image = PixArtImageProcessor.resize_and_crop_tensor(image, new_width, new_height)
print(image.size())

# expected: torch.Size([1, 3, 960, 1280])
# actual: torch.Size([1, 3, 1, 1280])
```

### Logs

_No response_

### System Info

diffusers==0.30.0.dev0

### Who can help?

_No response_

Start at PixArtImageProcessor.resize_and_crop_tensor and run the reproduction from the issue with the specified input and target sizes. Trace the returned tensor shape and verify the result is torch.Size([1, 3, 960, 1280]); done means the reported case produces the expected height and width without breaking the method’s existing behavior.

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