Improved RandomShortestSize Functionality

[MalumaDev]

Implement integer support for RandomShortestSize: randomly select a size between the provided integer minimum and the minimum of width and height

[pytorch-bot]

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[NicolasHug]

Thanks for the RP @MalumaDev . Can you share more details - why is this something you need?

[MalumaDev]

The current behavior, where passing an integer results in the same transformation, is counterintuitive and inconsistent with the Random element of the function name. By introducing integer support, we can achieve more flexible and versatile image resizing based on random dimensions within the specified range.

Expected Behavior:
Integer Input: Passing an integer min_size will result in a random size selected between min_size and the minimum of width and height. Retaining the existing behavior, passing an array [min_size, min_size] will continue to specify a fixed minimum size for both dimensions.

In this way, it provides more control over image resizing by allowing for random variations within a defined range.
Moreover, aligns the behavior with the function's name, ensuring that random selection is indeed applied when using an integer input.