Remove load from build-push-action

Author: dan-fernandes

.github/workflows/_container.yml

@@ -31,9 +31,8 @@ jobs:
         with:
           context: .
           # Need load and tags so we can test it below
-          load: true
           tags: tag_for_testing
-          outputs: dest=${{ runner.temp }}/myimage.tar
+          outputs: type=docker,dest=${{ runner.temp }}/myimage.tar
 
       - name: Test cli works in cached runtime image
         run: docker run --rm tag_for_testing --version