Run the puppet apply job less often

Previously we had a very small irrelevant files list for the puppet
apply job. Switch that to a files: list and try to explicitly list all
of the things that might care about being tested with puppet.

The idea here is that we'll run puppet testing less often and only run
it when we need it.

Change-Id: I7001022c0cae5526a405c93a33c2e85eeea5b679

zuul.d/puppet.yaml

@@ -53,9 +53,26 @@
     pre-run: playbooks/zuul/infra-puppet-apply/pre.yaml
     run: playbooks/zuul/infra-puppet-apply/run.yaml
     post-run: playbooks/zuul/infra-puppet-apply/post.yaml
-    irrelevant-files:
-      - docker/.*
-      - playbooks/.*
+    files:
+      - Gemfile
+      - Rakefile
+      - modules.env
+      - install_modules.sh
+      - manifests/.*
+      - modules/.*
+      - roles/puppet-install/.*
+      - hiera/.*
+      - inventory/.*
+      - playbooks/install_puppet.yaml
+      - playbooks/remote_puppet_adhoc.yaml
+      - playbooks/remote_puppet_else.yaml
+      - playbooks/service-eavesdrop.yaml
+      - playbooks/update_puppet_version.yaml
+      - playbooks/roles/disable-puppet-agent/.*
+      - playbooks/roles/puppet-run/.*
+      - playbooks/roles/puppet-setup-ansible/.*
+      - playbooks/zuul/infra-puppet-apply/.*
+      - playbooks/zuul/templates/.*
 
 - job:
     name: system-config-puppet-beaker-rspec-infra