[storage] trivial: test_pruner_config simpler
[storage] trivial: test_pruner_config simpler

no longer necessary to do nested loops now that we separate the pruner
configs

aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core