Enable scenario 001 job

... because the scenario enables Heat. Also, currently heat plugin
tests are enabled in scenario 001 only because scenario 003 does not
have cinder which is required for the plugin tests.

Depends-on: https://review.opendev.org/846101
Change-Id: I2917b378709fe9cb37565302fb5d3f65c59e7083

.zuul.yaml

@@ -2,6 +2,7 @@
     templates:
       - puppet-openstack-check-jobs
       - puppet-openstack-module-unit-jobs
+      - puppet-openstack-integration-jobs-scenario001
       - puppet-openstack-integration-jobs-scenario003
       - puppet-openstack-litmus-jobs
       - release-notes-jobs-python3