feat: remove seurat [wip]

[joyceyan]

Reason for Change

https://app.zenhub.com/workspaces/single-cell-5e2a191dad828d52cc78b028/issues/gh/chanzuckerberg/single-cell-data-portal/7366

Changes

removes all code relevant to seurat
TODO: need to figure out the terraform changes

Testing steps

tbd

Checklist 🛎️

• Add product, design, and eng as reviewers for rdev review
• For UI changes, add screenshots/videos, so the reviewers know what you expect them to see
• For UI changes, add e2e tests to prevent regressions
• For UI changes, verify impacted analytics events still work

Notes for Reviewer

[github-actions]

Deployment Summary

• backend_url: https://pr-7380-backend.rdev.single-cell.czi.technology
• backend_de_url: https://pr-7380-backend-de.rdev.single-cell.czi.technology
• backend_wmg_url: https://pr-7380-backend-wmg.rdev.single-cell.czi.technology
• frontend_url: https://pr-7380-frontend.rdev.single-cell.czi.technology
• delete_db_task_definition_arn: arn:aws:ecs:us-west-2:***:task-definition/dp-rdev-pr-7380-deletion:1
• migrate_db_task_definition_arn: arn:aws:ecs:us-west-2:***:task-definition/dp-rdev-pr-7380-migration:1