Update DPoS library to snapshot totalVotesReceived to voteWeight in consensus state

[shuse2]

Description

Update DPoS library to snapshot totalVotesReceived instead of forgers list at the end of the round.
During the snapshot,

• banned delegate should not be included in the snapshot
• Vote weight of punished delegate should be set to 0
• While undoing, irrelevant snapshots can be removed. (ie: list which will be used more than 2 rounds ahead can be changed, so it can be deleted)
• Save the list with key: round to next round + offset(2)
• Vote weight should be capped to the self vote * 10

Motivation

In order to calculate the correct forger list with the offset, delegate weight needs to be stored.

Acceptance Criteria

• Test case where there are banned delegates
• Test case where there are punished delegates
• Test case for first 3 rounds, which should be created at the startup
• Test case when undo, future list is removed.
• Test case where vote weight is capped by self vote

Related issues

#4915