optimizations for db_read and db_write

[scf0220]

We made some performance optimizations for db_read and db_write

1. Provide a faster serialization method: the current method is too slow, and frequent serialization and deserialization will affect performance . pr : add fast serde for basic type  #1772
2. Optimize gas processing: the current logic, every time you get gas, the first step is to get the store first, and the second step is to get the value from the store, we can optimize the first step . pr:optimize process gas #1771
3. Optimize db_write performance: The current logic is that each time a set has to be written to the store, we can use the cache to record the current value, and then update the store after the transaction is executed . pr:add state cache for read/write/remove #1770
4. Optimize the db_read function: the value acquired by the current logic needs to re-apply for a space. The current logic is to reuse the space where the value is located to avoid applying for memory space multiple times pr:add state cache for read/write/remove #1770