refactor: ProvingKey has ProverPolynomials #5976

Job	Run time
setup / start-builder	13s
setup / setup	11s
bb-native-tests	10m 2s
bb-bench-binaries	11m 0s
build	18m 49s
noir-projects	5m 52s
yarn-project-formatting	17m 18s
yarn-project-test	11m 23s
setup-bench / start-builder	1m 12s
setup-bench / setup	27s
bb-bench	5m 6s
e2e (e2e-browser)	1m 38s
e2e (e2e-docs-examples)	1m 8s
e2e (e2e-sandbox-example)	1m 44s
e2e (e2e-tests)	8m 33s
e2e (flakey-e2e-tests)	4m 18s
e2e (guides-dapp-testing)	3m 13s
e2e (guides-writing-an-account-contract)	1m 14s
e2e (integration-l1-publisher)	2m 11s
e2e (pxe)	52s
e2e (uniswap-trade-on-l1-from-l2)	6m 12s
merge-check	1s
notify	0s
	1h 52m 37s

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