ci: Use qemu instead of docker

.github/workflows/release_aarch64.yml

@@ -16,22 +16,15 @@ jobs:
         with:
           platforms: arm64
 
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v2
-
-      - name: Build Docker image
-        uses: docker/build-push-action@v4
-        with:
-          context: .
-          load: true
-          platforms: linux/arm64
-          tags: lablup/backend.ai-hook:latest
-
       - uses: actions/checkout@v4
 
       - name: Build libbaihook
         run: |
-          docker run --rm -v "$(pwd)" lablup/backend.ai-hook:latest /bin/bash -c "./build.sh ${{ matrix.os }}"
+          sudo apt-get update
+          sudo apt-get install -y qemu-user-static
+          sudo update-binfmts --enable qemu-arm
+          sudo update-binfmts --enable qemu-aarch64
+          ./build.sh ${{ matrix.os }}
           rm -rf Makefile
 
       - name: Release to GitHub