[stable/2023.2] feat: build arm64 images for computes (#1423)

This is an automated cherry-pick of #1350
/assign mnaser
diff --git a/zuul.d/container-images/neutron.yaml b/zuul.d/container-images/neutron.yaml
index 8e9557d..66ce8aa 100644
--- a/zuul.d/container-images/neutron.yaml
+++ b/zuul.d/container-images/neutron.yaml
@@ -47,6 +47,7 @@
           repository: registry.atmosphere.dev/library/neutron
           arch:
             - linux/amd64
+            - linux/arm64
           build_args:
             - "RELEASE={{ zuul.branch | replace('stable/', '') }}"
             - PROJECT=neutron