Remove non-voting status from watcher-operator-validation-master job

[morenod]

watcher-operator-validation-master is passing consistently now, we can enable it

https://softwarefactory-project.io/zuul/t/rdoproject.org/builds?job_name=watcher-operator-validation-master&project=openstack-k8s-operators/watcher-operator

[openshift-ci]

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[morenod]

I didnt see this was already being fixed on #175