migrate contract staking storage into trie

[envestcc]

What would you like to be added

1 - migrate the latest contract staking storage from indexer to trie 2 - indexer support historical storage

Why is this needed

How important you think this is for IoTeX

• [] must have
• [x] should have
• [] nice to have

Additional information

Let us know any background or context that would help us better understand the request (for example the particular use-case that prompted this request)