Use python jobs template for Zed

The current master should be compatible with the Zed
release of the other projects. oslo.log dropped support
for py36 see related-bug

openstack-tox-py37 is no longer used anywhere so removing it.
With Zed template, py38, py39, py310 already comes let's run
those here.

Related-Bug: 1974244

Signed-off-by: Chandan Kumar (raukadah) <chkumar@redhat.com>
Change-Id: I9a3b89d85b542c49109044658cfd26f3c0219940

.zuul.yaml

@@ -1,15 +1,13 @@
 - project:
     templates:
       - publish-openstack-docs-pti
-      - openstack-python3-wallaby-jobs
+      - openstack-python3-zed-jobs
       - release-notes-jobs-python3
     check:
       jobs:
-        - openstack-tox-py37
         - openstack-tempest-skiplist-validate
     gate:
       jobs:
-        - openstack-tox-py37
         - openstack-tempest-skiplist-validate
 
 - job: