[VEN-2083]: Support for syncing of votes

[GitGuru7]

Description

Resolves VEN-2083

Related to VenusProtocol/governance-contracts#60

Checklist

• I have updated the documentation to account for the changes in the code.
• If I added new functionality, I added tests covering it.
• If I fixed a bug, I added a test preventing this bug from silently reappearing again.
• My contribution follows Venus contribution guidelines.

[chechu]

I think this XVSVault should be a set of changes on top of the XVSVault modified here: https://github.com/VenusProtocol/venus-protocol/pull/418/files#diff-ba34e5590dd9b2f2198d8098088d1a6fde6d4976728e9eadc4ef4c28201d9947R777

In that new XVSVault we are supporting chains based on timestamps, instead of block numbers

[github-actions]

Package	Line Rate	Branch Rate	Health
contracts	100%	100%	✔
contracts.Admin	88%	41%	✔
contracts.Comptroller	100%	90%	✔
contracts.Comptroller.Diamond	95%	59%	✔
contracts.Comptroller.Diamond.facets	75%	65%	➖
contracts.Comptroller.Diamond.interfaces	100%	100%	✔
contracts.DelegateBorrowers	100%	89%	✔
contracts.Governance	33%	20%	❌
contracts.InterestRateModels	47%	67%	❌
contracts.Lens	44%	37%	❌
contracts.Liquidator	83%	60%	✔
contracts.Oracle	100%	100%	✔
contracts.PegStability	88%	84%	✔
contracts.Swap	90%	58%	✔
contracts.Swap.interfaces	100%	100%	✔
contracts.Swap.lib	81%	55%	✔
contracts.Tokens	100%	100%	✔
contracts.Tokens.Prime	96%	72%	✔
contracts.Tokens.Prime.Interfaces	100%	100%	✔
contracts.Tokens.Prime.libs	90%	76%	✔
contracts.Tokens.VAI	71%	46%	➖
contracts.Tokens.VRT	20%	9%	❌
contracts.Tokens.VTokens	68%	50%	➖
contracts.Tokens.XVS	19%	8%	❌
contracts.Utils	50%	30%	❌
contracts.VAIVault	50%	45%	➖
contracts.VRTVault	49%	36%	❌
contracts.XVSVault	76%	58%	➖
contracts.XVSVault.VoteSyncBridgeUtils	73%	53%	➖
contracts.XVSVault.VoteSyncBridgeUtils.interfaces	100%	100%	✔
contracts.lib	75%	25%	➖
Summary	70% (3550 / 5042)	50% (1323 / 2626)	➖