AA-430: (WIP) Encode 'UsedGasBreakdown' struct for 'postPaymasterTx' frame

[forshtat]

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[drortirosh]

I still think that this breakdown is "too much information". It dumps internal gas breakdown to the paymaster.
Paymaster are now required to use a helper method to sum/sub all params.

• paymaster are now "incentivized" to use this breakdown information - but that makes them even more exposed to internal impl:
  • (e.g 7702 is never "installed", and paid by "preTx" rather than "deployment")
  • erc-4337 is here to stay for a long time on mainnet, and we can't add it to 4337. Thus Paymasters that support these features are incompatible by definition (and such price differences are much more relevant on L1 than on L2..)

OTOH, this breakdown is not even enough:

• actual breakdown of execution (or even validation) to "modules" and "target contract" is unavailable (technically, we can't)
• paymaster is given the breakdown - but only after the TX. neither account nor paymaster are given the breakdown prior the TX (during validation)