add generalized barycentric degree check for degree < 2^l #138
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A generalized check based on Dankrad's note https://notes.ethereum.org/@dankrad/barycentric_low_degree_check with linear complexity.
See https://www.notion.so/Generalized-Low-Degree-Check-for-Degree-2-l-1e2b5c4c5ccc413c81503ff3eb12cb88 for the equations.