Are both `rollup_config.toml` and `rollup_config` crate needed?

[LiveDuo]

Right now there are two configs in the examples folder. There's const-rollup-config and rollup_config.toml.

Is there a conceptual distinction in between the two configs? If not, can const-rollup-config refactored into rollup_config.toml for better clarity and to avoid hardcoding ROLLUP_NAMESPACE_RAW and SEQUENCER_DA_ADDRESS?