Update SDL2 to 2.32.8 for Windows (x86_64) and MacOS (ARM and Intel)

[PalumboN]

Trying to see if it's related to #983

[guillep]

@PalumboN, @tesonep was telling me we are using a version of SDL with some patches.
He was going to verify if the latest ones from SDL are good (do not need the patches).

[PalumboN]

Ok, just two comments:

1. This PR has a hack for the build (get the file from the SDL release), because we need the file in the Pharo server to build, and I didn't have access.
2. This was made trying to solve the issue Image is not clickable/frozen after hidden restart on Microsoft Remote Desktop #983, that was already solved.

Soooo, we can merge this just to update the lib to the last version, what is good. Or just close the PR :)

[guillep]

Yes, but my point is that before we were using the libs compiled by ourselves (with touches)!

    set(BASE_URL "https://files.pharo.org/vm/pharo-spur${ARCH}/${PLATNAME}/third-party/")

And with this PR SDL is downloaded from the main SDL releases (without our touches!)

    set(BASE_URL "https://github.com/libsdl-org/SDL/releases/download/release-2.32.8/")