Add a soft dependency between gitea build and run

When we run the run-gitea job, make sure that it runs *after*
the gitea image build job, if the build job ran at all.  If
it didn't, we don't need to worry about it.

This has to happen in the project pipeline config because the
job dependency is different in check and gate.

Change-Id: I7cb069a6cd40a4ae8d5cbcdf23e7686b301493a1

.zuul.yaml

@@ -131,6 +131,7 @@
         - context: docker/gitea
           target: gitea-openssh
           repository: opendevorg/gitea-openssh
+    # Duplicate in the run-gitea job
     files: &gitea_files
       - docker/gitea/.*
 
@@ -539,6 +540,9 @@
       - playbooks/roles/haproxy/
       - testinfra/test_gitea.py
       - testinfra/test_gitea_lb.py
+      # From gitea_files -- If we rebuild the image, we want to run
+      # this job as well.
+      - docker/gitea/.*
 
 - job:
     name: system-config-run-zuul-preview
@@ -607,7 +611,10 @@
         - system-config-run-nodepool
         - system-config-run-docker
         - system-config-run-docker-registry
-        - system-config-run-gitea
+        - system-config-run-gitea:
+            dependencies:
+              - name: system-config-build-image-gitea
+                soft: true
         - system-config-run-zuul-preview
         - system-config-build-image-jinja-init
         - system-config-build-image-gitea-init
@@ -629,7 +636,10 @@
         - system-config-run-nodepool
         - system-config-run-docker
         - system-config-run-docker-registry
-        - system-config-run-gitea
+        - system-config-run-gitea:
+            dependencies:
+              - name: system-config-upload-image-gitea
+                soft: true
         - system-config-run-zuul-preview
         - system-config-upload-image-jinja-init
         - system-config-upload-image-gitea-init