fix: TestSubmitAggregateAndProof_AggregateOk to assert RPC result and not mutate pool#15861

GarmashAlex wants to merge 2 commits intoOffchainLabs:developOffchainLabs/prysm:developfrom

GarmashAlex:fix/validator-aggregator-test-assertionGarmashAlex/prysm:fix/validator-aggregator-test-assertionCopy head branch name to clipboard