Feat/benchmarks refactor

[lrazovic]

This PR lays the groundwork for properly benchmarking our runtime.

• We've included all pallets that contain a WeightInfo config parameter within the define_benchmarks! macro. This inclusion allows us to start the benchmark using the node compiled with the runtime-benchmarks feature.
• The just command for executing the benchmarks has been made generic to the pallet's name. For instance, executing just benchmark-runtime pallet-proxy allows us to benchmark pallet-proxy. Any pallet that is part of the define_benchmarks! macro can be benchmarked using this command.

Curious to see which pallets/extrinsic we can run benchmarks of? cargo run --features runtime-benchmarks --release benchmark pallets --list --chain=base-polkadot

• Following the merge of Feature/plmc 398 add treasury pallet to base runtime should like the one in #154, we encountered failures in the runtime benchmarks for the pallet-elections-phragmen. To address this:
  • We added the ElectionsConfig to the Genesis Config, as in https://github.com/paritytech/polkadot-sdk/blob/8c1c99f07a4623c9454e40e6bc077c6ba4611e4e/substrate/bin/node/cli/src/chain_spec.rs#L408-L415.
  • ❗To be Verified: The balance of the endowed accounts was modified during the benchmarks otherwise the balance was too loo. This adjustment needs further review to ensure its accuracy and correctness.

    polimec-node/pallets/elections-phragmen/src/benchmarking.rs

    Line 32 in a7928b7

    let amount = default_stake::<T>(T::MaxVoters::get()) * T::CandidacyBond::get();

[lrazovic]

A genesis config is required to start the benchmarks.

[JuaniRios]

lgtm

[vstam1]

LGTM