chore(releases): delete new_groups column from release model (#88105)

- followup from 
   - #88024
   - #88046
- relates to #87322
- [notion
doc](https://www.notion.so/sentry/Removing-new_groups-field-from-Release-model-1c28b10e4b5d801d8598dd15e7a5b215?showMoveTo=true&saveParent=true)
for context & plan

the `new_groups` field on the `Release` model was deprecated a long time
ago:


https://github.com/getsentry/sentry/blob/b88166941846ce4fdb4e2001453e421b41ba7e10/src/sentry/models/release.py#L210-L211

Author: michellewzhang

migrations_lockfile.txt

@@ -17,7 +17,7 @@ remote_subscriptions: 0003_drop_remote_subscription
 
 replays: 0004_index_together
 
-sentry: 0851_new_group_nullable
+sentry: 0852_delete_new_groups_column
 
 social_auth: 0002_default_auto_field
 

src/sentry/migrations/0852_delete_new_groups_column.py

@@ -0,0 +1,31 @@
+# Generated by Django 5.1.7 on 2025-03-27 16:38
+
+from sentry.new_migrations.migrations import CheckedMigration
+from sentry.new_migrations.monkey.fields import SafeRemoveField
+from sentry.new_migrations.monkey.state import DeletionAction
+
+
+class Migration(CheckedMigration):
+    # This flag is used to mark that a migration shouldn't be automatically run in production.
+    # This should only be used for operations where it's safe to run the migration after your
+    # code has deployed. So this should not be used for most operations that alter the schema
+    # of a table.
+    # Here are some things that make sense to mark as post deployment:
+    # - Large data migrations. Typically we want these to be run manually so that they can be
+    #   monitored and not block the deploy for a long period of time while they run.
+    # - Adding indexes to large tables. Since this can take a long time, we'd generally prefer to
+    #   run this outside deployments so that we don't block them. Note that while adding an index
+    #   is a schema change, it's completely safe to run the operation after the code has deployed.
+    # Once deployed, run these manually via: https://develop.sentry.dev/database-migrations/#migration-deployment
+
+    is_post_deployment = False
+
+    dependencies = [
+        ("sentry", "0851_new_group_nullable"),
+    ]
+
+    operations = [
+        SafeRemoveField(
+            model_name="release", name="new_groups", deletion_action=DeletionAction.DELETE
+        ),
+    ]