iOS "App Store" release

[frenzibyte]

This covers the prerequisites / steps for smooth sailing, as well as notes to raise for discussion in here.

• Bump SDL once Fix iOS text input not working with password integration libsdl-org/SDL#11845 gets in
• Update Fix touch input cancellation no longer being handled in latest SDL osu-framework#6484 with the new SDL package
• Look through all open PRs in https://github.com/orgs/ppy/projects/21 and choose what needs to be merged and what can be postponed

Side notes:

• Apple Pencil should not display menu cursor on hover #31182
  • I'm not sure if this should be fixed before release, but if so, the SDL-side about this is finished, all that is left is proper o!f implementation. there are two ways to go around implementing this: the half-baked way that's enough to fulfill the issue thread, or the full-fledged way by inventing an entire input flow system for pen input and translate that to mouse input similar to how touch input works.
• Multiplayer room design layout does not work on mobile #31034
  • I can try to improve this but I think it'll take more than just reducing padding on the screen, could be things like removing the existence of the drawable room card entirely to save vertical space, and that will take moderate amount of time to get working and get right probably. Maybe not worth it, I don't know. Need advice from design team.
• Downloading beatmaps from the listing is not good/possible on mobile #31151
  • Same as above, and totally of less priority than the above. Need advice from design team.
• If you hold your finger with the intention of using it as a pointer in gameplay but player has not finished loading yet, the finger will not be registered as such and none of the notes will be hit.
  • If this should be fixed I'll open an issue thread and discuss what's necessary to fix it (it will not be simple, it will revive an old osu-framework PTIM PR that I abandoned, Sync initial input state of PassThroughInputManager from parent osu-framework#6398).

[frenzibyte]

cc @peppy