import zuul job settings from project-config

This is a mechanically generated patch to complete step 1 of moving
the zuul job settings out of project-config and into each project
repository.

Because there will be a separate patch on each branch, the branch
specifiers for branch-specific jobs have been removed.

Because this patch is generated by a script, there may be some
cosmetic changes to the layout of the YAML file(s) as the contents are
normalized.

See the python3-first goal document for details:
https://governance.openstack.org/tc/goals/stein/python3-first.html

Change-Id: Iafd8de12b2955193e2f10d5219d55f30f361ddac
Story: #2002586
Task: #24757

.zuul.yaml

@@ -1,12 +1,24 @@
 - project:
+    templates:
+      - openstack-specs-jobs
     check:
       jobs:
         - service-types-authority-tox-publish
+        - openstack-tox-pep8
     gate:
       jobs:
         - service-types-authority-tox-publish
 
 
+        - openstack-tox-pep8
+    post:
+      jobs:
+        - propose-updates:
+            vars:
+              update_target: os-service-types
+            dependencies:
+              - publish-service-types-authority
+        - publish-service-types-authority
 - job:
     name: service-types-authority-tox-publish
     parent: tox