feat(Staking): implement migration logic

[TuDo1403]

Description

Contract changes

The table below shows the following info:

• Logic: the logic is changed.
• ABI: the ABI is changed.
• Init data: new storage field is declared and needs initializing.
• Dependent: needs to be changed due to changes in other contracts.

Contract name	Logic	ABI	Init data	Dependent
FastFinalityTracking
GovernanceAdmin
Maintenance
Profile
SlashIndicator
Staking
StakingVesting
ValidatorSet

Checklist

• I have chosen the base of the PR to the release/** branch.
• I have named the PR following the format of [contract_name] what_is_changed, where contract_name is the list of changed contracts, separated by |, or is * if there is changed in more than 3 contracts
• I have ticked in the Contract changes table to guide the deployer which contracts to be upgraded.
• I have clearly commented on all the main functions following the NatSpec Format
• The box that allows repo maintainers to update this PR is checked
• I tested locally to make sure this feature/fix works