- Update get-mesa.sh to query dpkg --print-architecture to install
the correct packages dynamically, enabling aarch64 support.
- Update get-vulkan-sdk.sh to install via apt-get on Linux
(libvulkan-dev, vulkan-validationlayers, glslang-tools,
spirv-tools) instead of downloading LunarG's x86_64 tarball.
- Add runner architecture to Mesa and Vulkan SDK GitHub Action cache
keys to prevent collision.
- Update test.sh and preamble.sh to detect aarch64 and point to
the appropriate aarch64-linux-gnu libraries.
- Fix typos and some renaming
ddb2de1649