ci images: Fix creation of CentOS 9 stream test container.

CentOS 9 Stream package pytho3-devel was not installable, and as it is
not required for the testing container, it was removed from the
Dockerfile used to create the image.

molecule/centos-9-build/Dockerfile

@@ -5,7 +5,6 @@ RUN rm -fv /var/cache/dnf/metadata_lock.pid; \
 dnf makecache; \
 dnf --assumeyes install \
     /usr/bin/python3 \
-    /usr/bin/python3-config \
     /usr/bin/dnf-3 \
     sudo \
     bash \