I modified a part of the code to enable parallel inference with multiple num_batch

[zhugelaozei]

Hi！Since I found that SAHI cannot perform parallel inference when using YOLOv11 for slicing inference, I modified part of the code and adapted it to work with the relevant parts of Ultralytics' code.Unfortunately, I have only adapted the Ultralytics part of the code for now.I hope this is helpful to you.

[fcakyon]

Great @zhugelaozei ! Can you please fix the formatting by:

1. Install development dependencies:
   pip install -e ."[dev]"

2. Run code formatting:
   python -m scripts.run_code_style format

[tonyreina]

Does the num_batch here refer to running bounding box detections on multiple slices of the same image in a batch? Or is it running multiple images at one time in a batch? Could you provide an example of how to use it?