DEVELOPER: when a builtin is migrated to sbpf, please add its corresponding
migration feature ID to solana-builtin-default-costs::BUILTIN_INSTRUCTION_COSTS,
so the builtin’s default cost can be determined properly based on feature status.
When migration completed, and the feature gate is enabled everywhere, please
remove that builtin entry from solana-builtin-default-costs::BUILTIN_INSTRUCTION_COSTS.