Enable Vulkan with a temporary opt-in setting (#12931)

* docs: vulkan information

* Revert "CI: Set up temporary opt-out Vulkan support (#12614)"

This reverts commit 8b6e5baee7.

* vulkan: temporary opt-in for Vulkan support

Revert this once we're ready to enable by default.

* win: add vulkan CI build

scripts/build_linux.sh

@@ -13,13 +13,12 @@ set -eu
 . $(dirname $0)/env.sh
 
 mkdir -p dist
-NOVULKAN=${NOVULKAN:-""}
 
 docker buildx build \
         --output type=local,dest=./dist/ \
         --platform=${PLATFORM} \
         ${OLLAMA_COMMON_BUILD_ARGS} \
-        --target archive${NOVULKAN} \
+        --target archive \
         -f Dockerfile \
         .