Remove statefullness from DKG instances #552

Job	Run time
check	32s
wasm-test (1.67, wasm32-unknown-unknown)	6m 54s
wasm-test (stable, wasm32-unknown-unknown)	6m 59s
python-test (stable, wasm32-unknown-unknown, 3.11)	3m 56s
yarn-test (stable, wasm32-unknown-unknown)	4m 41s
python-test (stable, wasm32-unknown-unknown, 3.12)	3m 59s
test (x86_64-unknown-linux-gnu, 1.67)	2m 45s
test (x86_64-unknown-linux-gnu, stable)	2m 37s
compile-benchmarks	6m 5s
codecov	10m 39s
benchmark	0s
	49m 7s

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