Remove statefullness from DKG instances #556

Job	Run time
python-test (stable, wasm32-unknown-unknown, 3.11)	4m 11s
wasm-test (1.67, wasm32-unknown-unknown)	6m 55s
check	28s
wasm-test (stable, wasm32-unknown-unknown)	6m 50s
yarn-test (stable, wasm32-unknown-unknown)	4m 33s
python-test (stable, wasm32-unknown-unknown, 3.12)	4m 15s
test (x86_64-unknown-linux-gnu, 1.67)	2m 42s
test (x86_64-unknown-linux-gnu, stable)	2m 35s
codecov	10m 1s
compile-benchmarks	5m 50s
benchmark	0s
	48m 20s

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