Fix `expect_pallet` benchmarks not relaying on hard-coded `frame_system` dependency version (#2288)
## Problem/Motivation The benchmark for the `ExpectPallet` XCM instruction uses a hard-coded version `4.0.0` for the `frame_system` pallet. Unfortunately, this doesn't work for the `polkadot-fellows/runtimes` repository, where we use dependencies from `crates.io`, e.g., [frame-system::23.0.0.0](https://github.com/polkadot-fellows/runtimes/blob/dd7f86f0d50064481ed0b7c0218494a5cfad997e/relay/kusama/Cargo.toml#L83). Closes: https://github.com/paritytech/polkadot-sdk/issues/2284 ## Solution This PR fixes the benchmarks that require pallet information and enables the runtime to provide the correct/custom pallet information. The default implementation provides `frame_system::Pallet` with index `0`, where the version is not hard-coded but read from the runtime. ## Local testing Added log for `T::valid_pallet` to the benchmarks like: ``` let valid_pallet = T::valid_pallet(); log::info!( target: "frame::benchmark::pallet", "valid_pallet: {}::{}::{}::{}::{}", valid_pallet.index, valid_pallet.module_name, valid_pallet.crate_version.major, valid_pallet.crate_version.minor, valid_pallet.crate_version.patch, ); ``` Run benchmarks for `westend`: ``` cargo run --bin=polkadot --features=runtime-benchmarks -- benchmark pallet --steps=2 --repeat=1 --extrinsic=* --heap-pages=4096 --json-file=./bench.json --chain=westend-dev --template=./polkadot/xcm/pallet-xcm-benchmarks/template.hbs --pallet=pallet_xcm_benchmarks::generic --output=./polkadot/runtime/westend/src/weights/xcm ``` --- For actual `frame_system` version: ``` [package] name = "frame-system" version = "4.0.0-dev" ``` Log dump: ``` 2023-11-13 12:56:45 Starting benchmark: pallet_xcm_benchmarks::generic::query_pallet 2023-11-13 12:56:45 valid_pallet: 0::frame_system::4::0::0 2023-11-13 12:56:45 valid_pallet: 0::frame_system::4::0::0 2023-11-13 12:56:45 valid_pallet: 0::frame_system::4::0::0 2023-11-13 12:56:45 Starting benchmark: pallet_xcm_benchmarks::generic::expect_pallet 2023-11-13 12:56:45 valid_pallet: 0::frame_system::4::0::0 2023-11-13 12:56:45 valid_pallet: 0::frame_system::4::0::0 2023-11-13 12:56:45 valid_pallet: 0::frame_system::4::0::0 ``` For changed `frame_system` version: ``` [package] name = "frame-system" version = "5.1.3-dev" ``` Log dump: ``` 2023-11-13 12:51:51 Starting benchmark: pallet_xcm_benchmarks::generic::query_pallet 2023-11-13 12:51:51 valid_pallet: 0::frame_system::5::1::3 2023-11-13 12:51:51 valid_pallet: 0::frame_system::5::1::3 2023-11-13 12:51:51 valid_pallet: 0::frame_system::5::1::3 2023-11-13 12:51:51 Starting benchmark: pallet_xcm_benchmarks::generic::expect_pallet 2023-11-13 12:51:51 valid_pallet: 0::frame_system::5::1::3 2023-11-13 12:51:51 valid_pallet: 0::frame_system::5::1::3 2023-11-13 12:51:51 valid_pallet: 0::frame_system::5::1::3 ``` ## References Closes: https://github.com/paritytech/polkadot-sdk/issues/2284