feat(preprod): Add back extras JSONField

[trevor-e]

The final PR in our saga to change the type of extras -> models.JSONField. This simply adds back the column.

See #93466 and #93388

[github-actions]

This PR has a migration; here is the generated SQL for src/sentry/preprod/migrations/0003_drop_sentry_jsonfield_actual.py src/sentry/preprod/migrations/0004_add_django_jsonfield.py

for 0003_drop_sentry_jsonfield_actual in preprod

--
-- Remove field extras from preprodartifact
--
ALTER TABLE "sentry_preprodartifact" DROP COLUMN "extras" CASCADE;

for 0004_add_django_jsonfield in preprod

--
-- Add field extras to preprodartifact
--
ALTER TABLE "sentry_preprodartifact" ADD COLUMN "extras" jsonb NULL;

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@             Coverage Diff             @@
##           master   #93485       +/-   ##
===========================================
- Coverage   88.00%   77.73%   -10.28%     
===========================================
  Files       10319    10308       -11     
  Lines      594699   594092      -607     
  Branches    23129    23012      -117     
===========================================
- Hits       523376   461821    -61555     
- Misses      70830   131839    +61009     
+ Partials      493      432       -61     

[asottile-sentry]

[github-actions]

This PR has a migration; here is the generated SQL for src/sentry/preprod/migrations/0004_add_django_jsonfield.py

for 0004_add_django_jsonfield in preprod

--
-- Add field extras to preprodartifact
--
ALTER TABLE "sentry_preprodartifact" ADD COLUMN "extras" jsonb NULL;