Bug Description

As discussed in #1354 (review), the wp_calculate_image_sizes() function does not currently account for the changes made to the sizes attribute in PR #1329.

We need to update the sizes value in wp_calculate_image_sizes() so that any usage of this core function benefits from the improved sizes attribute.

Alternatively, we should ensure that the enhanced sizes attribute is applied via the wp_calculate_image_sizes filter, so any other code that directly calls wp_calculate_image_sizes() will also benefit from the optimizations.