POLIO-1797 paginate dashboard endpoints

[quang-le]

endpoints consumed for ETL are not always paginated by default

Related JIRA tickets : POLIO-1797

Self proofreading checklist

• [x] Did I use eslint and black formatters
• [ ] Is my code clear enough and well documented
• [ ] Are my typescript files well typed
• [ ] New translations have been added or updated if new strings have been introduced in the frontend
• [ ] My migrations file are included
• [x] Are there enough tests
• [ ] Documentation has been included (for new feature)

Doc

NA

Changes

• group /polio/dashboards/ endpoints in same folder
• Make all viewsets inherit EtlModelViewset
• add test on default pagination query params

How to test

With Django API, test endpoints: pagination (limit=20&page=1) should be added to the API if not passed as queryparams directly

Print screen / video

NA

Notes

commit:

fix: paginate dashboard endpoints

refs: POLIO-1797