Benchmark pallet_bridge_parachains and pallet_bridge_messages

[boundless-forest]

Waiting for darwinia-network/darwinia-messages-substrate#270 and companion to the polkadot-v0.9.40 branch.

A note to the reviewer:

The benchmark implementation in the darwinia-message-substrate pallet-bridge-messages is based on the solo chain instead of the parachain. To make the benchmark work, we need to use verify_messages_proof intead of verify_messages_proof_from_parachain, otherwise, the message proof verification will fail. Of course, another way is to assign the message benchmark script to the upstream repo, usingverify_messages_proof_from_parachain, that means we need to make big changes to the current darwinia-messages-substrate repo. Considering the future plan of this repo, we can keep things simpler for now.

To make the benchmark call dispatch successful, the spec_version required to be the same as the hard-coded one in the messsage benchmark script. So introduced another VERSION under benchmark feature.