Witness charging order with limits

[gballet]

This is another take on #495, which doesn't pass the gas usage function as a parameter, but the total amount of gas available. This approach has two advantages:

1. it doesn't require removing the verkle gas functions, which should simplify mainlining the PR
2. it returns the gas to be consumed at the call site, which helps with readability (incidentally, there is a change to the UseGas function signature in master for the live tracer, which will make it trickier to handle

The difficulty was distinguishing the gas that is to be charged (consumed), from the gas that is requested (wanted). If wanted > charged then it is known that the contract ran out of gas.

In order to do so

• The touch* functions are changed to return the consumed and wanted gas. Locations will only be added to the witness if consumed == wanted.
• The Touch functions change to only return the wanted gas, so that the gas* functions can return it (in order to let the interpreter loop know that the dynamic gas is too much, while only adding locations that were fully paid for to the witness.
• Calls and contract creation use the consumed < wanted comparison to figure out if the subcall ran out of gas.