Update extract_images_and_pack2h5.py

[moothes]

There are three main modifications:

1. Support multiple formats by replacing formats = [wsi_format] if isinstance(wsi_format, str) else wsi_format by formats = wsi_format.split(';') if isinstance(wsi_format, str) else wsi_format;

2. Simplify the get_wsi_path function by merging two for h5_file in h5_files iterations;

3. Add time count for each process and print the time consumption after finishing each slide.

I’ve already tried replacing this file in my local environment and it works fine.