Remove statefullness from DKG instances #572

Job	Run time
check	26s
yarn-test (stable, wasm32-unknown-unknown)	2m 13s
wasm-test (1.67, wasm32-unknown-unknown)	4m 49s
python-test (stable, wasm32-unknown-unknown, 3.11)	1m 39s
wasm-test (stable, wasm32-unknown-unknown)	4m 13s
python-test (stable, wasm32-unknown-unknown, 3.12)	1m 39s
test (x86_64-unknown-linux-gnu, 1.67)	2m 45s
test (x86_64-unknown-linux-gnu, stable)	2m 33s
codecov	7m 21s
compile-benchmarks	3m 22s
benchmark	0s
	31m 0s

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