[storage] add list-accounts option for LibraDB storage inspector
[storage] add list-accounts option for LibraDB storage inspector

Closes: #3322
Approved by: thefallentree

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