[FRAME] Runtime Omni Bencher

[ggwpez]

This MR contains two major changes and some maintenance cleanup.

1. Free Standing Pallet Benchmark Runner

Closes #3045, depends on your runtime exposing the GenesisBuilderApi (like #1492).

Introduces a new binary crate: frame-omni-bencher.
It allows to directly benchmark a WASM blob - without needing a node or chain spec.

This makes it much easier to generate pallet weights and should allow us to remove bloaty code from the node.
It should work for all FRAME runtimes that dont use 3rd party host calls or non BlakeTwo256 block hashing (basically all polkadot parachains should work).

It is 100% backwards compatible with the old CLI args, when the v1 compatibility command is used. This is done to allow for forwards compatible addition of new commands.

Example (full example in the Rust docs)

Installing the CLI:

cargo install --locked --path substrate/utils/frame/omni-bencher
frame-omni-bencher --help

Building the Westend runtime:

cargo build -p westend-runtime --release --features runtime-benchmarks

Benchmarking the runtime:

frame-omni-bencher v1 benchmark pallet --runtime target/release/wbuild/westend-runtime/westend_runtime.compact.compressed.wasm --all

2. Building the Benchmark Genesis State in the Runtime

Closes #2664

This adds --runtime and --genesis-builder=none|runtime|spec arguments to the benchmark pallet command to make it possible to generate the genesis storage by the runtime. This can be used with both the node and the freestanding benchmark runners. It utilizes the new GenesisBuilder RA and depends on having #3412 deployed.

3. Simpler args for PalletCmd::run

You can do three things here to integrate the changes into your node:

• nothing: old code keeps working as before but emits a deprecated warning
• delete: remove the pallet benchmarking code from your node and use the omni-bencher instead
• patch: apply the patch below and keep using as currently. This emits a deprecated warning at runtime, since it uses the old way to generate a genesis state, but is the smallest change.

runner.sync_run(|config| cmd
-    .run::<HashingFor<Block>, ReclaimHostFunctions>(config)
+    .run_with_spec::<HashingFor<Block>, ReclaimHostFunctions>(Some(config.chain_spec))
)

4. Maintenance Change

• pallet-nis get a BenchmarkSetup config item to prepare its counterparty asset.
• Add percent progress print when running benchmarks.
• Dont immediately exit on benchmark error but try to run as many as possible and print errors last.