feat: upgrade to bobcat (#887)

diff --git a/images/neutron/Earthfile b/images/neutron/Earthfile
index 8b61017..a9b4712 100644
--- a/images/neutron/Earthfile
+++ b/images/neutron/Earthfile
@@ -1,21 +1,24 @@
 VERSION 0.7
 
+ARG --global PROJECT=neutron
+ARG --global RELEASE=zed
+ARG --global PROJECT_REF=222c997022392561c2de2cb493f0f5214eb20dfc
+
+build:
+  FROM ../openstack-service+builder --RELEASE=${RELEASE}
+  DO ../openstack-service+BUILD_VENV \
+    --PROJECT=${PROJECT} \
+    --PROJECT_REF=${PROJECT_REF} \
+    --PIP_PACKAGES="git+https://github.com/openstack/neutron-vpnaas.git@256464aea691f8b4957ba668a117963353f34e4c"
+
 platform-image:
-  ARG PROJECT=neutron
-  ARG RELEASE=zed
-  ARG REF=222c997022392561c2de2cb493f0f5214eb20dfc
-  FROM ../openstack-service+image \
-    --PROJECT ${PROJECT} \
-    --RELEASE ${RELEASE} \
-    --PROJECT_REF ${REF} \
-    --PIP_PACKAGES "git+https://github.com/openstack/neutron-vpnaas.git@256464aea691f8b4957ba668a117963353f34e4c"
-  DO \
-    ../+APT_INSTALL \
+  FROM ../openstack-service+image --RELEASE ${RELEASE} --PROJECT ${PROJECT}
+  COPY +build/venv /var/lib/openstack
+  DO ../+APT_INSTALL \
     --PACKAGES "conntrack dnsmasq dnsmasq-utils ebtables ethtool haproxy iproute2 ipset iptables iputils-arping jq keepalived lshw openvswitch-switch strongswan uuid-runtime"
-  DO ../+APPLY_PATCHES
   SAVE IMAGE --push \
     ghcr.io/vexxhost/atmosphere/${PROJECT}:${RELEASE} \
-    ghcr.io/vexxhost/atmosphere/${PROJECT}:${REF}
+    ghcr.io/vexxhost/atmosphere/${PROJECT}:${PROJECT_REF}
 
 image:
   BUILD --platform linux/amd64 --platform linux/arm64 +platform-image