Remove statefullness from DKG instances #555

Job	Run time
check	38s
yarn-test (stable, wasm32-unknown-unknown)	4m 17s
python-test (stable, wasm32-unknown-unknown, 3.11)	4m 8s
wasm-test (1.67, wasm32-unknown-unknown)	7m 24s
python-test (stable, wasm32-unknown-unknown, 3.12)	4m 12s
wasm-test (stable, wasm32-unknown-unknown)	6m 48s
test (x86_64-unknown-linux-gnu, 1.67)	2m 54s
test (x86_64-unknown-linux-gnu, stable)	2m 38s
compile-benchmarks	5m 46s
codecov	10m 31s
benchmark	0s
	49m 16s

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