Add support for a 256*256 image, to be used in the following commit.

Define sizes in named variables instead of being hard-coded in several places in
the code.

Allow parameters `preserve_aspect_ratio` and `upper_limit` to be passed from
the different helper methods.

Factorize the code inside `image_resize_images` to make it easier to read.

Add new function to compute whether the size of an image is above a given size.

task-34045
PR: #30656