Use Vulkan VCPKG only on Windows.

.github/workflows/pr_build.yml

@@ -64,7 +64,7 @@ jobs:
               runner: [self_hosted, type-cx52, image-x86-app-docker-ce]
               arch: amd64
               build_type: full
-              apt-dependencies: pkg-config libxext-dev libdouble-conversion-dev libpcre2-16-0 libpulse0 libharfbuzz-dev libnss3 libnspr4 libxdamage1 libasound2 # add missing dependencies to docker image when convenient
+              apt-dependencies: pkg-config libxext-dev libdouble-conversion-dev libpcre2-16-0 libpulse0 libharfbuzz-dev libnss3 libnspr4 libxdamage1 libasound2 vulkan-validationlayers libvulkan-dev libvulkan1 # add missing dependencies to docker image when convenient
               image: docker.io/overte/overte-full-build:0.1.1-ubuntu-20.04-amd64
             # Android builds are currently failing
             #- os: ubuntu-18.04
@@ -75,6 +75,7 @@ jobs:
               runner: [self_hosted, type-cax41, image-arm-app-docker-ce]
               arch: aarch64
               build_type: full
+              apt-dependencies: vulkan-validationlayers libvulkan-dev libvulkan1
               image: docker.io/overte/overte-full-build:0.1.1-ubuntu-22.04-aarch64
         fail-fast: false
     runs-on: ${{matrix.runner}}

cmake/ports/hifi-client-deps/CONTROL

@@ -1,4 +1,4 @@
 Source: hifi-client-deps
 Version: 0.1
 Description: Collected dependencies for High Fidelity applications
-Build-Depends: hifi-deps, aristo (windows), glslang, liblo (windows), nlohmann-json, openvr ((linux&!arm)|windows), quazip (!android), sdl2 (!android), spirv-cross (!android), spirv-tools (!android), sranipal (windows), vulkanmemoryallocator, vulkan, vulkan-validationlayers, discord-rpc (!android)
+Build-Depends: hifi-deps, aristo (windows), glslang, liblo (windows), nlohmann-json, openvr ((linux&!arm)|windows), quazip (!android), sdl2 (!android), spirv-cross (!android), spirv-tools (!android), sranipal (windows), vulkanmemoryallocator, vulkan (windows), vulkan-validationlayers (windows), discord-rpc (!android)