chore(alerts): Drop excluded projects trigger exclusion models (#81325)

The final PR to remove the `AlertRuleExcludedProjects` and
`AlertRuleTriggerExclusion` models. The models were removed from code in
https://github.com/getsentry/sentry/pull/81020.

migrations_lockfile.txt

@@ -15,7 +15,7 @@ remote_subscriptions: 0003_drop_remote_subscription
 
 replays: 0004_index_together
 
-sentry: 0796_rm_excluded_projects_triggers
+sentry: 0797_drop_excluded_project_triggers
 
 social_auth: 0002_default_auto_field
 

src/sentry/migrations/0797_drop_excluded_project_triggers.py

@@ -0,0 +1,30 @@
+# Generated by Django 5.1.1 on 2024-11-26 18:34
+
+from sentry.new_migrations.migrations import CheckedMigration
+from sentry.new_migrations.monkey.models import SafeDeleteModel
+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", "0796_rm_excluded_projects_triggers"),
+    ]
+
+    operations = [
+        SafeDeleteModel(name="AlertRuleExcludedProjects", deletion_action=DeletionAction.DELETE),
+        SafeDeleteModel(name="AlertRuleTriggerExclusion", deletion_action=DeletionAction.DELETE),
+    ]