build: update dependencies and relax version requirements

- Update Vulkan validation layers to 1.4.304.1
- Update Qt to 6.8.2
- Remove strict version requirements for various dependencies
- Update Vulkan-Headers, VulkanMemoryAllocator, and vcpkg submodules
- Reorganize discord-rpc compile options

This change makes the build system more flexible by removing unnecessary
version constraints while ensuring compatibility with newer versions of
key dependencies.

1 files changed, 0 insertions, 0 deletions

diff --git a/externals/Vulkan-Headers b/externals/Vulkan-Headers
-Subproject 39f924b810e561fd86b2558b6711ca68d4363f6
+Subproject 234c4b7370a8ea3239a214c9e871e4b17c89f4a