fix: codecoverage

[nayib-jose-gloria]

Reason for Change

• 7339

• The way our CI/CD is set-up, failures in coverage are blocking staging/prod deploys.

Changes

• upload-artifact v3 now needs an arg to explicitly allow for uploading hidden files (i.e. ".coverage-")

Testing steps

• run code coverage GHAs in this pr

[github-actions[bot]]

Deployment Summary

• backend_url: https://pr-7341-backend.rdev.single-cell.czi.technology
• backend_de_url: https://pr-7341-backend-de.rdev.single-cell.czi.technology
• backend_wmg_url: https://pr-7341-backend-wmg.rdev.single-cell.czi.technology
• frontend_url: https://pr-7341-frontend.rdev.single-cell.czi.technology
• delete_db_task_definition_arn: arn:aws:ecs:us-west-2:***:task-definition/dp-rdev-pr-7341-deletion:1
• migrate_db_task_definition_arn: arn:aws:ecs:us-west-2:***:task-definition/dp-rdev-pr-7341-migration:1

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 92.93%. Comparing base (0442ec7) to head (199f49f). Report is 4 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #7341 +/- ## ======================================= Coverage 92.93% 92.93% ======================================= Files 194 194 Lines 16818 16818 ======================================= Hits 15629 15629 Misses 1189 1189 ``` | [Flag](https://app.codecov.io/gh/chanzuckerberg/single-cell-data-portal/pull/7341/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=chanzuckerberg) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/chanzuckerberg/single-cell-data-portal/pull/7341/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=chanzuckerberg) | `92.93% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=chanzuckerberg#carryforward-flags-in-the-pull-request-comment) to find out more.

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