Progress: Refactoring DPF & DMPF to reduce alloc

Verifiable distributed multi-point function (DMPF) implementation

Based on the paper, Lightweight, Maliciously Secure Verifiable Function Secret Sharing (alt), Eurocrypt 2022

For academic purposes. With best effort to fullfill engineering requirements but no guarantee.

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SPDX-License-Identifier: Apache-2.0