containerfile: update test to jammy

We've not really been using the Focal containerfile, as we move
forward jammy is a better choice for keeping stable as we might find
some new users for it.

Also add binutils to bindep for native bullseye builds (see
Icb0e40827c9f8ac583fa143545e6bed9641bf613)

Change-Id: I22ebe2bbccaec34180e58996b21e47bfc4f36055

.zuul.d/jobs.yaml

@@ -21,7 +21,7 @@
     nodeset: debian-bullseye
     vars:
       dib_functests:
-        - containerfile/focal-build-succeeds
+        - containerfile/jammy-build-succeeds
         - openeuler-minimal/20.03-LTS-SP2-build-succeeds
         # Image based tests
         - centos/8-stream-build-succeeds

bindep.txt

@@ -2,6 +2,7 @@
 # see https://docs.openstack.org/infra/bindep/ for additional information.
 
 # common
+binutils
 bzip2
 util-linux
 dosfstools

diskimage_builder/elements/containerfile/test-elements/focal-build-succeeds/files/Dockerfile

@@ -1,2 +0,0 @@
-FROM docker.io/library/ubuntu:focal
-RUN touch /testfile

diskimage_builder/elements/containerfile/test-elements/jammy-build-succeeds/files/Dockerfile

@@ -0,0 +1,2 @@
+FROM docker.io/library/ubuntu:jammy
+RUN touch /testfile