Return multi-gas in execution result

[gligneul]

This PR adds up the dynamic and constant opcode multi-gas cost in the EVM interpreter, and then return it in the ExecutionResult struct.

Close NIT-3468

[Copilot]

Pull Request Overview

This PR adds tracking of multi-dimensional gas (“multi-gas”) throughout the EVM execution and surfaces it in the ExecutionResult.

• Extend the EVM.Call API to return a usedMultiGas value and update all call sites.
• Record static and dynamic multi-gas usage in the interpreter and aggregate it in state transition.
• Propagate UsedMultiGas into the ExecutionResult struct.

Reviewed Changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tests/state_test.go	Adjusted benchmark call to accept the extra blank return value
core/vm/runtime/runtime.go	Updated Execute/Call wrappers to ignore the new multi-gas return
core/vm/interpreter_test.go	Updated test to accept the additional blank return from Call
core/vm/interpreter.go	Track and accumulate multi-gas for static and dynamic operations
core/vm/instructions.go	Updated CALL opcode handler to unpack the new return value
core/vm/gas_table_test.go	Adapted tests to ignore the new multi-gas return
core/vm/evm.go	Extended EVM.Call signature and added zero‐gas fallbacks
core/vm/contract.go	Added UsedMultiGas field to Contract
core/state_transition.go	Added UsedMultiGas to ExecutionResult and propagate refunds
core/state_processor.go	Updated system call sites to unpack extra return from Call

Comments suppressed due to low confidence (3)

core/vm/interpreter.go:294

• [nitpick] The variable multigasDynamicCost could be renamed to dynamicMultiGasCost to align with dynamicCost and improve readability.

			var multigasDynamicCost *multigas.MultiGas

core/state_transition.go:754

• There are no tests verifying the new UsedMultiGas field in ExecutionResult; consider adding test cases to validate multi-gas is correctly computed and returned.

		UsedMultiGas:     usedMultiGas,

core/vm/evm.go:202

• Update the doc comment above EVM.Call to include the new usedMultiGas return parameter, explaining its purpose and units.

func (evm *EVM) Call(caller common.Address, addr common.Address, input []byte, gas uint64, value *uint256.Int) (ret []byte, leftOverGas uint64, usedMultiGas *multigas.MultiGas, err error) {