Add load arg to docker/bake-action before testing Docker images (#4124)

.github/workflows/docker_release.yml

@@ -6,7 +6,7 @@ on:
     branches:
       - main
     tags:
-      - 'v[0-9].[0-9]+.[0-9]+*'
+      - "v[0-9].[0-9]+.[0-9]+*"
 
 env:
   DOCKER_REPO_NAME: deepset/haystack
@@ -45,18 +45,20 @@ jobs:
         with:
           workdir: docker
           targets: base
+          load: true
           push: true
 
       - name: Test base images
         run: |
           EXPECTED_VERSION=$(cat VERSION.txt)
           function test_image {
-            local TAG=$1
-            local PLATFORM=$2
-            local VERSION=$(docker run --platform $PLATFORM --rm deepset/haystack:$TAG python -c"import haystack; print(haystack.__version__)")
+            local TAG, PLATFORM, VERSION
+            TAG=$1
+            PLATFORM=$2
+            VERSION=$(docker run --platform "$PLATFORM" --rm "deepset/haystack:$TAG" python -c"import haystack; print(haystack.__version__)")
             [[ "$VERSION" = "$EXPECTED_VERSION" ]] || echo "::error 'Haystack version in deepset/haystack:$TAG image for $PLATFORM is different from expected'"
             # Remove image after test to avoid filling the GitHub runner and prevent its failure
-            docker rmi deepset/haystack:$TAG
+            docker rmi "deepset/haystack:$TAG"
           }
           test_image base-cpu-${{ steps.meta.outputs.version }} linux/amd64
           test_image base-gpu-${{ steps.meta.outputs.version }} linux/amd64
@@ -104,6 +106,7 @@ jobs:
         with:
           workdir: docker
           targets: api-latest
+          load: true
           push: true
 
       - name: Test api image no version in tag