fix: Convert UUIDField columns to uuid type for MariaDB

[blarghmatey]

Description

The behavior of the MariaDB backend has changed for UUIDField from a CharField(32) to an actual uuid type in Django 5. This migration converts affected columns to prevent data insertion errors.

This migration converts the following columns:

• submissions_submission.uuid
• submissions_studentitem.uuid
• submissions_score.uuid

Supporting information

https://docs.djangoproject.com/en/5.2/releases/5.0/#migrating-uuidfield

Related PRs

• fix: Convert UUIDField columns to uuid type for MariaDB edx-platform#37494
• fix: Convert UUIDField columns to uuid type for MariaDB enterprise-catalog#1108
• fix: Convert UUIDField columns to uuid type for MariaDB edx-enterprise#2472
• fix: Convert UUIDField columns to uuid type for MariaDB django-user-tasks#446

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.89%. Comparing base (81cc930) to head (c37ca40).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #321   +/-   ##
=======================================
  Coverage   95.89%   95.89%           
=======================================
  Files          23       23           
  Lines        3022     3022           
  Branches      121      121           
=======================================
  Hits         2898     2898           
  Misses        113      113           
  Partials       11       11           

Flag	Coverage Δ
unittests	95.89% <100.00%> (ø)

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[ormsbee]

@blarghmatey: Why was this necessary?

[blarghmatey]

The first iteration of this PR was erroring on a migrations check because of parallel histories.