feat: add 'spatial' metadata field to curation/v1/datasets endpoint

[nayib-jose-gloria]

Reason for Change

• 7331

[github-actions[bot]]

Deployment Summary

• backend_url: https://pr-7337-backend.rdev.single-cell.czi.technology
• backend_de_url: https://pr-7337-backend-de.rdev.single-cell.czi.technology
• backend_wmg_url: https://pr-7337-backend-wmg.rdev.single-cell.czi.technology
• frontend_url: https://pr-7337-frontend.rdev.single-cell.czi.technology
• delete_db_task_definition_arn: arn:aws:ecs:us-west-2:***:task-definition/dp-rdev-pr-7337-deletion:1
• migrate_db_task_definition_arn: arn:aws:ecs:us-west-2:***:task-definition/dp-rdev-pr-7337-migration:1