feat: Penalty gas#12
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This change adds the calculation for the penalty gas in the V0.7 Entrypoint to the postOp totalGasUsed calculation for ERC20 flows.
The penalty gas is based off of the executionGasLimit vs what was the actual execution gas used. This difference is charged at 10% in v0.7 as a method of preventing bundlers from a potential denial of service attack.
The paymaster now includes the gas penalty in postOp calculations to ensure the paymaster is properly paid for UserOperations onchain. Prior a userOp would not get paid for the penalty gas onchain, and was expected to be handled offchain by the exchange rate.