[macOS] Update Vulkan SDK install script.

[trashguy]

Latest version of SDK switched from DMG to ZIP.

[Spartan322]

Isn't this gonna create a merge conflict with godotengine/godot#97981 if we sync with the Godot master branch? Could we please not merge Godot PRs that get merged into Godot.

[AwesomeParley]

Isn't this gonna create a merge conflict with godotengine/godot#97981 if we sync with the Godot master branch? Could we please not merge Godot PRs that get merged into Godot.

To be fair, we are going to go a different direction than Godot, so eventually we are going to not be able to sync. This is a small thing that can easily just get situated while syncing, and thanks to you (I'm being genuine), it makes it easier to see what the issue is, and make syncing a smoother process if/when we do sync next.

[Spartan322]

The problem is that if something is already merged into Godot, making a PR and merging it is pointless and needlessly disruptive to keeping up with upstream for no reason, and we're not gonna be going out of sync in any way for a long while. It only even makes sense to stay out of sync with Godot when we introduce something new not included in Godot or that was in a rejected or excessively old PR for Godot, we should not focus on merging the highly active and new PRs. (least not without very good reason to do so, like if its extremely necessary for some reason and Godot hasn't yet merged it yet)

That PR was merged before this PR was even created, there was no reason for us to need to merge this over just syncing to upstream.