SCORU/Node: move Node_context and related modules outside of protocol directory
Context
This MR moves the Node_context module, the central state component used by the rollup node, outside the protocol directories.
Depends on !8824 (merged), !8830 (merged), !8876 (merged), !8979 (merged), !9128 (merged), !9129 (merged).
Edited by Alain Mebsout