Add CCO2 retirement handling to polygon-digital-carbon subgraph

[0xAurelius]

Should be similar to the way Moss/MCO2 retirements are handled, but instead of bridging back to ETH L1, the retirement is made directly on Polygon by calling a function on the CCO2

In particular there is a burn function on the CCO2 token, which emits a burnedCO2Token(amountForUser) event which we can use to track the total amount of CCO2 retired

CCO2 implementation contract: https://polygonscan.com/address/0x42b107333dfc1e59d37f625a675a1b23d79ece0a#code
Proxy with actual tokens: https://polygonscan.com/address/0x82b37070e43c1ba0ea9e2283285b674ef7f1d4e2#writeContract