feat: use CurveStableSwapMetaNG contract

[rndquu]

This PR removes our current TWAP implementation and refactors the code to use the latest curve's metapool implementation with TWAP built-in.

Resolves:

• cergyk - LibTWAPOracle::update temporary redemption DOS if uAD/3CRV metapool has very low liquidity sherlock-audit/2023-12-ubiquity-judging#105
• cergyk - UbiquityPool::redeemDollar DoS on redeeming if USDT/USDC depegs sherlock-audit/2023-12-ubiquity-judging#59
• cergyk - LibTWAPOracle::update Providing large liquidity will manipulate TWAP, DOSing redeem of uADs sherlock-audit/2023-12-ubiquity-judging#56
• cergyk - LibUbiquityPool::mintDollar/redeemDollar reliance on arbitrarily short TWAP oracle may be inefficient for preventing depeg sherlock-audit/2023-12-ubiquity-judging#20
• cergyk - LibUbiquityPool::mintDollar/redeemDollar reliance on outdated TWAP oracle may be inefficient for preventing depeg sherlock-audit/2023-12-ubiquity-judging#13

[gitcoindev]

Hi @rndquu I started the review, and did a quick scan first to get understanding of the changes. Since the pull request is big, it will take me some time to process. I will check the new curve implementation docs and go through the changes again tomorrow morning with a fresh brain and provide my feedback.

[molecula451]

heavy refactor, looking clean, as far as I am concern, this new metapool fixes most of the issues that comes with recent findings on TWAP so it comes reloaded!

[gitcoindev]

All right! I needed a strong coffee. I am approving from my side as well.

My main takeaways noted during the review:

• TWAPOracleDollar3poolFacet and IMetaPool removed in favor of ICurveStableSwapMetaNG

• MockMetaPool is now MockCurveStableSwapMetaNG.

• twapOracleDollar3PoolFacetImplementation is out, meaning one facet less to deploy. Curve metapool is now stored and fully managed in managerFacet.

• Metapool layout is as before, Dollar token first (index 0), 3CRV token has index 1.

• TWAP price for Dollar is now available as ICurveStableSwapMetaNG(store.stableSwapMetaPoolAddress).price_oracle(0);

[0xadrii]

Pairing Dollar with the tripool will still cause this issue, even if the pool used is a StableSwapMetaNG and not the old curve pools.
Recommendation:
The best solution to achieve an actual peg to $1 would be to use Chainlink price feeds instead. or to pair Dollar with a different asset that is actually pegged to $1 rather than 3CRV, given that currently the pool price will tend to follow 3CRV's price, which currently trades at $1.03.