Pull hound's base python image from quay

The parent change moves python base image publishing to quay. Pull the
base image from there when building the hound image.

We switch to building with docker now that docker is capable of
building with speculative images in single arch builds.

Change-Id: If480e82df346219fd74596d012bac18750614080

docker/hound/Dockerfile

@@ -30,7 +30,7 @@ RUN git clone https://github.com/hound-search/hound \
     && cd hound \
     && make
 
-FROM docker.io/opendevorg/python-base:3.12-bookworm
+FROM quay.io/opendevorg/python-base:3.12-bookworm
 
 COPY --from=builder /tmp/hound/.build/bin/hound /usr/local/bin
 COPY --from=builder /tmp/hound/.build/bin/houndd /usr/local/bin

zuul.d/docker-images/hound.yaml

@@ -7,6 +7,7 @@
     parent: system-config-build-container-image
     vars: &hound_vars
       promote_container_image_job: system-config-upload-image-hound
+      container_command: docker
       container_images:
         - context: docker/hound
           registry: quay.io