Merge 'antithesis: Upload config image in GitHub Actions workflow' from Pekka Enberg

The Antithesis config image was not being uploaded during CI runs, only
the workload image. This caused experiment failures when the config
image expired from the registry after 6 months of inactivity.

Closes #3863

.github/workflows/antithesis.yml

@@ -24,8 +24,11 @@ jobs:
     steps:
     - uses: actions/checkout@v3
 
-    - name: Publish workload 
+    - name: Publish workload
       run: bash ./scripts/antithesis/publish-workload.sh
 
+    - name: Publish config
+      run: bash ./scripts/antithesis/publish-config.sh
+
     - name: Launch experiment
       run: bash ./scripts/antithesis/launch.sh

scripts/antithesis/publish-config.sh

@@ -14,6 +14,6 @@ export DOCKERFILE=stress/Dockerfile.antithesis-config
 
 export DOCKER_DIR=stress
 
-cat turso.key.json | docker login -u _json_key https://$ANTITHESIS_DOCKER_HOST --password-stdin
+docker login -u _json_key https://$ANTITHESIS_DOCKER_HOST --password "$ANTITHESIS_REGISTRY_KEY"
 
 ${BASH_SOURCE%/*}/publish-docker.sh