Put stateful sets in its own openshift template

**Describe the task**
We have ".bc.yml", ".dc.yml", ".config.yml" and ".cronjob.yml" - wonder if we need a similar convention for stateful sets?
**Acceptance Criteria**
- [ ] Stateful sets live in their own template

**Additional context**
- For consistency

Start by locating the existing .bc.yml, .dc.yml, .config.yml, and .cronjob.yml templates and identify where StatefulSet definitions currently live. Compare their conventions and determine the template boundary needed for StatefulSets. Done means StatefulSets reside in their own template and the deployment configuration still references them correctly.

Written by the indexing model from the issue text.