[Script]: Add simulate migration script for REP-002 & REP-003

[TuDo1403]

Description

This PR add simulation scripts for upcoming REP-002 & REP-003 upgrades on mainnet.

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
BridgeTracking
GovernanceAdmin
Maintenance
SlashIndicator
Staking
StakingVesting
ValidatorSet

Checklist

• 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