Add job to test with SQLAlchemy master (2.x)

Signed-off-by: Stephen Finucane <stephenfin@redhat.com>
Change-Id: Idcf698e7266c10f468123489a964404e9a68a7be

.zuul.yaml

@@ -176,6 +176,22 @@
     vars:
       tox_envlist: dnspython-latest
 
+# Temporary job until SQLAlchemy 2.0 is no longer blocked by upper-requirements
+- job:
+    name: designate-tox-py310-with-sqlalchemy-2x
+    parent: openstack-tox-py310
+    description: |
+      Run unit tests with main branch of SQLAlchemy, alembic and oslo.db.
+      Takes advantage of the base tox job's install-siblings feature.
+    # The job only tests the latest and shouldn't be run on the stable branches
+    branches: ^(?!stable)
+    required-projects:
+      - name: github.com/sqlalchemy/sqlalchemy
+        override-checkout: main
+      - name: github.com/sqlalchemy/alembic
+        override-checkout: main
+      - name: openstack/oslo.db
+
 - project-template:
     name: designate-devstack-jobs
     queue: designate
@@ -214,11 +230,13 @@
     check:
       jobs:
         - neutron-tempest-plugin-designate-scenario
+        - designate-tox-py310-with-sqlalchemy-2x
         - designate-tox-dnspython-latest:
             voting: false
     gate:
       jobs:
         - neutron-tempest-plugin-designate-scenario
+        - designate-tox-py310-with-sqlalchemy-2x
     experimental:
       jobs:
         - designate-pdns4-postgres