Return image ID from media_sideload_image function

[arkimedia]

media_sideload_image function is missing an option to return image ID, which is often needed instead of html or source link.

(In fact, both of the current return options could be genereted from ID by using other core functions)

[arkimedia]

Media Sideload Image function Git diff

[SergeyBiryukov]

Hi @arkimedia, thanks for the ticket.

We're already tracking this issue in #19629.

[arkimedia]

Thanks - I'll switch to follow it instead.