[wip] Reorganize public param module #1087
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This adapts to upstream lurk-lab/arecibo#285, which removes the need for separate `ProverKey` and `VerifierKey` instances (the former containing `CommitmentKey` copies) in Public Parameters. - Implemented structural changes in `nova.rs` for improvements in key handling for the prover and verifier keys, which generated as `OnceCell`, - Revamped `disk_cache.rs` with added `Arc` imports, elimination of lifetime parameter `'a` from `DiskCache`, modifications of `read` and `write` functions, and updates in the serialization and deserialization steps. - Altered `public_params` and `supernova_public_params` functions in `mod.rs` to deal more capably with errors and modified various methods and tests to align with the changes in `disk_cache.rs`. - Removed complete `mem_cache.rs` file, which was unsafe, and unused. - Moved initialization of `store` to an earlier point in `fibonacci_prove` function and made minor formatting changes in `fibonacci.rs`.
…dependency - Removed `Abomonation` trait and `PrimeField` imports from `multiframe.rs`, also simplified the `NonUniformCircuit` access in the same file. - Removed `Abomonation` trait bounds from the `circuit_cache_key` functions in `supernova.rs`. - Refactored `Instance<>` struct in `instance.rs`, removing the usage of `Abomonation` and `PhantomData`, and eliminated need for lifetime declaration `'a`. - Enhanced `open()` method in `instance.rs` to include metadata comparison to prevent instance mismatches.
…on bounds - Improved `supernova.rs` by using `OnceCell` to store `ProverKey` and `VerifierKey` and updating related methods, - removed uneeded Abomonation bounds in a few places.
…rc usage - reduced complexity by removing `std::sync::Arc` in `src/public_parameters/disk_cache.rs`. - Modified `read` and `write` functions in `DiskCache` to work directly with `PublicParams`.
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Due to upstream changes lurk-lab/arecibo#285 lurk-lab/arecibo#288