Prevent double & incorrect charging of EVM-XVM gas fee

[Dinonard]

Pull Request Summary

By specifying max_fee_per_gas to be zero, we instruct EVM executor not to charge the caller for gas fees.

This is ok since the XVM call will be charged in the context of its originating call.

EVM runner reference code: https://github.com/paritytech/frontier/blob/master/frame/evm/src/runner/stack.rs#L135

[github-actions[bot]]

Package	Line Rate	Branch Rate	Health
precompiles/xcm/src	84%	0%	✔
chain-extensions/xvm/src	0%	0%	❌
frame/pallet-xvm/src	11%	0%	❌
precompiles/substrate-ecdsa/src	78%	0%	➖
precompiles/xvm/src	94%	0%	✔
frame/collator-selection/src	80%	0%	✔
frame/xc-asset-config/src	70%	0%	➖
precompiles/assets-erc20/src	73%	0%	➖
frame/dapps-staking/src/pallet	90%	0%	✔
precompiles/dapps-staking/src	93%	0%	✔
precompiles/utils/src	72%	0%	➖
primitives/xcm/src	68%	0%	➖
chain-extensions/dapps-staking/src	0%	0%	❌
frame/pallet-xcm/src	65%	0%	➖
frame/pallet-xvm/src/pallet	34%	0%	❌
chain-extensions/types/xvm/src	0%	0%	❌
chain-extensions/rmrk/src	0%	0%	❌
chain-extensions/types/dapps-staking/src	0%	0%	❌
chain-extensions/types/rmrk/src	0%	0%	❌
precompiles/sr25519/src	79%	0%	➖
frame/dapps-staking/src	83%	0%	✔
precompiles/utils/macro/src	0%	0%	❌
frame/block-reward/src	85%	0%	✔
precompiles/utils/macro/tests	0%	0%	❌
precompiles/utils/src/data	72%	0%	➖
frame/custom-signatures/src	57%	0%	➖
Summary	59% (2582 / 4343)	0% (0 / 0)	➖

Minimum allowed line rate is 50%