Report the build page url in Zuul

At the conclusion of jobs, rather than reporting direct links to
the log archive locations to Gerrit, report a link to the build
page for each build.  This will allow us to reduce the reliance
on OSLA and our log server and eventually move to storing logs
in swift.

Change-Id: Idacbb57867ea37ce40963f47e6f0c25ba9e033ef

zuul/main.yaml

@@ -1,6 +1,7 @@
 - tenant:
     name: opendev
     max-nodes-per-job: 10
+    report-build-page: true
     source:
       gerrit:
         config-projects:
@@ -19,6 +20,7 @@
 - tenant:
     name: kata-containers
     max-nodes-per-job: 1
+    report-build-page: true
     source:
       gerrit:
         config-projects:
@@ -55,6 +57,7 @@
 - tenant:
     name: openstack
     max-nodes-per-job: 10
+    report-build-page: true
     source:
       gerrit:
         config-projects:
@@ -1580,6 +1583,7 @@
     name: zuul
     default-ansible-version: 2.8
     max-nodes-per-job: 10
+    report-build-page: true
     source:
       gerrit:
         config-projects: