fix(db): make bucket_prefix column immutable for storage buckets (#4108)

internal/db/schema/migrations/oss/postgres/80/01_storage_bucket.up.sql

@@ -0,0 +1,11 @@
+-- Copyright (c) HashiCorp, Inc.
+-- SPDX-License-Identifier: BUSL-1.1
+
+begin;
+
+drop trigger immutable_columns on storage_plugin_storage_bucket;
+
+create trigger immutable_columns before update on storage_plugin_storage_bucket
+  for each row execute procedure immutable_columns('public_id', 'scope_id', 'create_time', 'bucket_name', 'bucket_prefix');
+
+commit;