molten-vk: install ICD to non-overridable path

[cho-m]

• Have you followed the guidelines for contributing?
• Have you ensured that your commits follow the commit style guide?
• Have you checked that there aren't other open pull requests for the same formula update/change?
• Have you built your formula locally with HOMEBREW_NO_INSTALL_FROM_API=1 brew install --build-from-source <formula>, where <formula> is the name of the formula you're submitting?
• Is your test running fine brew test <formula>, where <formula> is the name of the formula you're submitting?
• Does your build pass brew audit --strict <formula> (after doing HOMEBREW_NO_INSTALL_FROM_API=1 brew install --build-from-source <formula>)? If this is a new formula, does it pass brew audit --new <formula>?

---

Closes #203233.

May as well use non-overridable path to reduce chances of user configuration impacting functionality.

Prior bottle,

❯ XDG_DATA_DIRS=/tmp vulkaninfo --summary
ERROR: [Loader Message] Code 0 : vkCreateInstance: Found no drivers!
Cannot create Vulkan instance.
This problem is often caused by a faulty installation of the Vulkan driver or attempting to use a GPU that does not support Vulkan.
ERROR at /tmp/vulkan-tools-20241221-15121-nec5zd/Vulkan-Tools-1.4.304/vulkaninfo/./vulkaninfo.h:456:vkCreateInstance failed with ERROR_INCOMPATIBLE_DRIVER

❯ vulkaninfo --summary | rg driver
VK_LUNARG_direct_driver_loading        : extension revision 1
	driverVersion      = 0.2.2019
	driverID           = DRIVER_ID_MOLTENVK
	driverName         = MoltenVK
	driverInfo         = 1.2.11
	driverUUID         = 4d564b00-0000-27e3-0f02-020700000000

New build:

❯ XDG_DATA_DIRS=/tmp vulkaninfo --summary | rg driver
VK_LUNARG_direct_driver_loading        : extension revision 1
	driverVersion      = 0.2.2019
	driverID           = DRIVER_ID_MOLTENVK
	driverName         = MoltenVK
	driverInfo         = 1.2.11
	driverUUID         = 4d564b00-0000-27e3-0f02-020700000000

[github-actions]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.

[cho-m]

Would be nicer to test within molten-vk but dependency tree makes this complicated. vulkan-tools is the easiest way to check Vulkan devices but it has a dependency on molten-vk.

Just added test to vulkan-tools which will fail on existing bottle:

==> /opt/homebrew/Cellar/vulkan-tools/1.4.307/bin/vulkaninfo --summary
ERROR: [Loader Message] Code 0 : vkCreateInstance: Found no drivers!
Cannot create Vulkan instance.
This problem is often caused by a faulty installation of the Vulkan driver or attempting to use a GPU that does not support Vulkan.
ERROR at /tmp/vulkan-tools-20250130-18179-16lo75/Vulkan-Tools-1.4.307/vulkaninfo/./vulkaninfo.h:574:vkCreateInstance failed with ERROR_INCOMPATIBLE_DRIVER

[github-actions]

🤖 An automated task has requested bottles to be published to this PR.