Deals with migration of tox base job to Ubuntu Jammy

OpenStack Infra Zuul jobs (openstack/openstack-zuul-jobs)
adds support of Zuul node based on Ubuntu Jammy on 2022 Oct 12th
(6d85fd8399ed6b9f2358412945cd6683989662cd).
This causes CI failure in openstack-tox-cover, openstack-tox-pep8,
ironic-tox-unit-with-driver-libs, ironic-tox-bandit and
ironic-cross-sushy (there is no package named 'python-dev' in
Ubuntu Jammy).

This commit fixes this through specifying Ubuntu Focal Zuul node.

Change-Id: I98955e90f216411c0ca3077dfb20fc3f2dc5b93e

bindep.txt

@@ -46,7 +46,7 @@ iptables [devstack]
 net-tools [platform:rpm devstack]
 
 # these are needed to compile Python dependencies from sources
-python-dev [platform:dpkg test]
+python-dev [platform:dpkg test !platform:ubuntu-jammy]
 python3-all-dev [platform:dpkg !platform:ubuntu-precise test]
 python3-devel [platform:rpm test]
 build-essential [platform:dpkg test]

zuul.d/ironic-jobs.yaml

@@ -660,6 +660,7 @@
 
 - job:
     name: ironic-tox-unit-with-driver-libs
+    nodeset: ubuntu-focal
     parent: openstack-tox
     description: |
       Run python 3 unit tests with driver dependencies installed.
@@ -696,6 +697,7 @@
 - job:
     # Security testing for known issues
     name: ironic-tox-bandit
+    nodeset: ubuntu-focal
     parent: openstack-tox
     timeout: 2400
     vars:
@@ -1053,6 +1055,7 @@
 - job:
     name: ironic-cross-sushy
     description: Ironic unit tests run with Sushy from source
+    nodeset: ubuntu-focal
     parent: openstack-tox
     required-projects:
       - name: opendev.org/openstack/ironic
@@ -1086,6 +1089,7 @@
     check:
       jobs:
         - openstack-tox-pep8:
+            nodeset: ubuntu-focal
             required-projects:
                 - name: openstack/requirements
                   override-checkout: stable/yoga
@@ -1100,6 +1104,7 @@
     gate:
       jobs:
         - openstack-tox-pep8:
+            nodeset: ubuntu-focal
             required-projects:
                 - name: openstack/requirements
                   override-checkout: stable/yoga
@@ -1138,12 +1143,14 @@
     check:
       jobs:
         - openstack-tox-cover:
+            nodeset: ubuntu-focal
             required-projects:
                 - name: openstack/requirements
                   override-checkout: stable/yoga
     gate:
       jobs:
         - openstack-tox-cover:
+            nodeset: ubuntu-focal
             required-projects:
                 - name: openstack/requirements
                   override-checkout: stable/yoga