MSM optimisations: CycloneMSM #379

Job	Run time
Bench (default)	14m 57s
Wasm-compatibility (wasm32-unknown-unknown)	1m 9s
Rustfmt	18s
Clippy lint checks	30s
Wasm-compatibility (wasm32-wasi)	1m 13s
Bench (asm)	15m 24s
Test (default)	10m 44s
Bench (bn256-table)	15m 34s
Test (bn256-table)	10m 43s
Test (derive_serde)	11m 19s
Test (asm)	10m 10s
	1h 32m 1s

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