* Django FSM migration to Viewflow

- Added new `django-viewflow` and `django-filter` dependencies to `requirements.txt`.
- New file `viewflow.py` under `/audit/models/` which contains the FSM logic for transitioning an SAC.
- Moved `STATUS` enumeration outside of the `SingleAuditChecklist` class. This required import/reference changes across many files and tests.
- Removed references of old deprecated library `django-fsm`.
- New migration to handle the changing the SAC's `submission_name` field to remove dependency on the deprecated `django-fsm`.

* Git conflicts with #4292

This should drop a now deprecated `admin_api_v1_0_0`, which appears to still exist in the dev environment. It is likely to also still exist in staging and prod. This update drops the table to prevent any hassles with newer table changes, migrations, etc.

* Update drop_schema.sql

This should drop a now deprecated `admin_api_v1_0_0`, which appears to still exist in the dev environment. It is likely to also still exist in staging and prod. This update drops the table to prevent any hassles with newer table changes, migrations, etc.

* Update drop_schema.sql

One more for the road.  Follow-up to #4328.

* Updating Python to 3.12

* Updating runtime.txt

* Replacing removed assertEquals with assertEqual

* Replacing removed assertAlmostEquals with assertAlmostEqual