ref: re-introduce migration to unpickle project options (#67436)

copy paste of `0454_pickle_to_json_sentry_projectoptions` but
post-squash

<!-- Describe your PR here. -->

migrations_lockfile.txt

@@ -9,5 +9,5 @@ feedback: 0004_index_together
 hybridcloud: 0015_apitokenreplica_hashed_token_index
 nodestore: 0002_nodestore_no_dictfield
 replays: 0004_index_together
-sentry: 0676_apitoken_hashed_indexes
+sentry: 0677_unpickle_project_options_again
 social_auth: 0002_default_auto_field

src/sentry/migrations/0677_unpickle_project_options_again.py

@@ -0,0 +1,34 @@
+# Generated by Django 2.2.28 on 2023-05-19 17:25
+
+from django.db import migrations
+
+from sentry.new_migrations.migrations import CheckedMigration
+from sentry.utils.query import RangeQuerySetWrapperWithProgressBar
+
+
+def _backfill(apps, schema_editor):
+    cls = apps.get_model("sentry", "ProjectOption")
+
+    for obj in RangeQuerySetWrapperWithProgressBar(cls.objects.all()):
+        # load pickle, save json
+        obj.save(update_fields=["value"])
+
+
+class Migration(CheckedMigration):
+    # data migration: must be run out of band
+    is_dangerous = True
+
+    # data migration: run outside of a transaction
+    atomic = False
+
+    dependencies = [
+        ("sentry", "0676_apitoken_hashed_indexes"),
+    ]
+
+    operations = [
+        migrations.RunPython(
+            _backfill,
+            migrations.RunPython.noop,
+            hints={"tables": ["sentry_projectoptions"]},
+        ),
+    ]