* use front-end backtracking field in the `pathfinding/blocks` endpoint and send it to core * remove the current editoast logic adding the backtracking information in the `stdcm` endpoint. Instead use the information forwarded by the front-end * remove the editoast backtracking feature flag which was previously used in the `stdcm` endpoint
pathfinding/blocksendpoint and send it to corestdcmendpoint. Instead use the information forwarded by the front-endstdcmendpoint