The goal of this task is to add pipeline and system tests to the Custom STIX integration.
### Tasks
- [ ] Create pipeline tests for every supported STIX Domain Object
- [ ] Create system tests over CEL input
- [ ] Create system tests over Filestream input
This is a subtask for https://github.com/elastic/integrations/issues/4710.
The goal of this task is to add pipeline and system tests to the Custom STIX integration.