Define irrelevant-files for tempest-full-py3 job

tempest-full-py3 job runs on nova check and gate pipeline
as part of 'integrated-gate-py35' template.

Unlike tempest-full or other job, nova job definition list on
project-config side[1] does not define the irrelevant-files for
tempest-full-py job which leads to run this job on doc/test file
only change also.

This commit defines the irrelevant-files for tempest-full-py3 on
nova's zuul.yaml.

Closes-Bug: #1785425

[1] https://github.com/openstack-infra/project-config/blob/57907fbf04c3f9a69d390efee800d42697faae16/zuul.d/projects.yaml#L9283

Change-Id: I887177c078a53c53e84289a6b134d7ea357dfbef

.zuul.yaml

@@ -163,6 +163,8 @@
         - nova-tox-functional
         - nova-tox-functional-py35
         - openstack-tox-lower-constraints
+        - tempest-full-py3:
+            irrelevant-files: *dsvm-irrelevant-files
     gate:
       jobs:
         - nova-cells-v1
@@ -172,6 +174,8 @@
         - nova-tox-functional
         - nova-tox-functional-py35
         - openstack-tox-lower-constraints
+        - tempest-full-py3:
+            irrelevant-files: *dsvm-irrelevant-files
     experimental:
       jobs:
         - nova-caching-scheduler