fix: let an abort reach a load that is still transforming its request (#8071)

* fix: let an abort reach an image or raster load that is still transforming its request

* refactor: declare transformAndGetImage with export function

* Doc: Change comment to be clearer

* Refactor: Rename _request to _abortController

---------

Co-authored-by: Harel M <harel.mazor@gmail.com>