[GIP-103] Create GHO, USDT, DAI pools and adjust USDC pool limits

Over the past few weeks, the utilization of the USDC Gearbox pool has been close to 90%. Even despite 25%+ organic profitability (30% taking into account GEAR LM). One hypothesis is that users do not like to swap stablecoins into each other to provide liquidity and prefer to store them “as is”. Those USDT lovers are looking for USDT farms, USDC lovers are looking for USDC farms, DAI lovers are looking for DAI farms, etc. Therefore, it is proposed to create several additional avenues for the provision of stablecoins: USDT pool, DAI pool and GHO pool.

Specification

It is proposed to add in…