Refactor DKG parameters into a `DkgParams` #512

Job	Run time
check	28s
python-test (stable, wasm32-unknown-unknown, 3.12)	1m 9s
wasm-test (1.67, wasm32-unknown-unknown)	2m 27s
yarn-test (stable, wasm32-unknown-unknown)	1m 39s
wasm-test (stable, wasm32-unknown-unknown)	2m 8s
test (x86_64-unknown-linux-gnu, 1.67)	4m 37s
test (x86_64-unknown-linux-gnu, stable)	2m 20s
codecov	4m 22s
compile-benchmarks	2m 58s
benchmark	0s
	22m 8s

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