Update reserve website to take the curve liquidity into account

[bayological]

Description The reserve website currently does not update totals based on the liquidity in the curve USDC/cUSD pool. We need to update the logic that calculates the stable supply & reserve holdings to take this pool into account.

Acceptance Criteria

• [x] USDC reserve holdings displayed on site include pool amount
• [x] Total supply of cUSD takes into account amount included in curve pool
• [x] Mobius pool code is removed

[ninabarbakadze]

👀