Remove statefullness from DKG instances #553

Job	Run time
python-test (stable, wasm32-unknown-unknown, 3.11)	4m 11s
check	29s
python-test (stable, wasm32-unknown-unknown, 3.12)	4m 8s
wasm-test (1.67, wasm32-unknown-unknown)	6m 54s
yarn-test (stable, wasm32-unknown-unknown)	4m 30s
wasm-test (stable, wasm32-unknown-unknown)	6m 51s
test (x86_64-unknown-linux-gnu, 1.67)	2m 50s
test (x86_64-unknown-linux-gnu, stable)	2m 32s
codecov	11m 19s
compile-benchmarks	5m 51s
benchmark	0s
	49m 35s

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