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

This is a temporary job to ensure we are compatible (and stay
compatible) with SQLAlchemy 2.x until such a time as the
upper-constraint cap is removed (hopefully in Caracal release).

Change-Id: I4ac9df1f32c5cd71ac9bc7d4cf1eb042039d93b5
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>

zuul.d/jobs.yaml

@@ -120,6 +120,7 @@
       jobs:
         - octavia-tox-py39-tips
         - octavia-tox-functional-py39-tips
+        - octavia-tox-functional-py39-sqlalchemy-tips
 
 - job:
     name: octavia-tox-py39-tips
@@ -145,6 +146,23 @@
       - openstack/octavia-lib
       - openstack/octavia
 
+# Temporary job until SQLAlchemy 2.0 is no longer blocked by upper-requirements
+# NOTE(stephenfin): We only need functional tests since DB interactions are
+# stubbed out in unit tests
+- job:
+    name: octavia-tox-functional-py39-sqlalchemy-tips
+    parent: openstack-tox-functional-py39
+    description: |
+      Run tox python 3.9 functional against master of sqlalchemy and related projects
+    # The job only tests the latest and shouldn't be run on the stable branches
+    branches: ^(?!stable)
+    required-projects:
+      - name: openstack/oslo.db
+      - name: github.com/sqlalchemy/sqlalchemy
+        override-checkout: main
+      - name: github.com/sqlalchemy/alembic
+        override-checkout: main
+
 - job:
     name: octavia-amphora-image-build
     parent: base