`xvm_call` now returns output- or encoded error data

[0x7CFE]

This PR adds the ability to get output data of a XVM call, or an error.

Implementation details

• To get output data from pallet contracts, we now use bare_call which returns ContractExecResult
• In order to access output data from EVM precompile, a new xvm_bare_call API was added to the XVM pallet.
• This allows doing direct cross pallet calls completely bypassing the Dispatchable API and without emitting events.
• xvm_call precompile now returns (bool success, uint64 gas_spent, bytes memory data)

Notes

According to the design, XVM does not pose any restrictions on the format of the data returned from the call. It is considered to be an implementation detail of the XVM backend. For example, error data returned from Wasm backend are in fact SCALE encoded Result. For EVM backend this can be different.

How it was tested

• flipper contract from ink! examples was deployed on Shibuya/Zombienet
• Solidity contract was written that calls into flipper and gets its value
• Logs were checked to see that returned value does indeed contain value of flipper's bit

[github-actions[bot]]

Package	Line Rate	Branch Rate	Health
chain-extensions/xvm/src	0%	0%	❌
frame/contracts-migration/src	0%	0%	❌
frame/dapps-staking/src	89%	0%	✔
frame/pallet-xcm/src	64%	0%	➖
frame/pallet-xvm/src/pallet	8%	0%	❌
chain-extensions/types/assets/src	0%	0%	❌
chain-extensions/pallet-assets/src	0%	0%	❌
precompiles/assets-erc20/src	76%	0%	➖
precompiles/sr25519/src	79%	0%	➖
chain-extensions/types/xvm/src	0%	0%	❌
precompiles/substrate-ecdsa/src	78%	0%	➖
chain-extensions/types/dapps-staking/src	0%	0%	❌
frame/block-reward/src	82%	0%	✔
precompiles/dapps-staking/src	93%	0%	✔
precompiles/xcm/src	84%	0%	✔
precompiles/xvm/src	63%	0%	➖
primitives/xcm/src	64%	0%	➖
frame/collator-selection/src	80%	0%	➖
chain-extensions/dapps-staking/src	0%	0%	❌
frame/xc-asset-config/src	68%	0%	➖
precompiles/utils/src/data	72%	0%	➖
precompiles/utils/src	72%	0%	➖
precompiles/utils/macro/tests	0%	0%	❌
frame/dapps-staking/src/pallet	87%	0%	✔
frame/pallet-xvm/src	6%	0%	❌
precompiles/utils/macro/src	0%	0%	❌
frame/custom-signatures/src	52%	0%	➖
Summary	61% (2591 / 4220)	0% (0 / 0)	➖

Minimum allowed line rate is 50%