Switch the requirements-constraints job to py310

Since the PTI switched the supported python versions for the current
cycle from 3.8+3.9 to 3.9+3.10, we want to update the constraints
generation accordingly. Since we don't have a stable platform where we
can run both py3.9 and py3.10 in parallel, generate constraints only for
py3.10 for now.

Change-Id: I4a4d9cb6e292bb693ae424be0928501fed81113f

playbooks/proposal/propose_update.sh

@@ -36,8 +36,8 @@ elif [ "$OWN_PROJECT" == "requirements-constraints" ] ; then
     VENV=$(readlink -f .tox/venv)
     $VENV/bin/pip install -e .
     function update {
-        $VENV/bin/generate-constraints -b blacklist.txt -p /usr/bin/python3.8 \
-            -p /usr/bin/python3.9 \
+        $VENV/bin/generate-constraints -b blacklist.txt -p /usr/bin/python3.10 \
+            --version-map 3.10:3.9 \
             -r global-requirements.txt > $1/upper-constraints.txt
     }
 elif [ "$OWN_PROJECT" == "devstack-plugins-list" ] ; then

zuul.d/projects.yaml

@@ -4603,6 +4603,7 @@
       jobs:
         - propose-updates:
             branches: master
+            nodeset: ubuntu-jammy
             vars:
               update_target: requirements-constraints