Backport PRs from main branch

[valentinfernandez1]

It backports the changes introduced to the main branch and updates them to v9.40. The PRs updated are:

• Code cleanup Code cleanup #166
• Benchmark drop_assets() of TrappistDropAssets Benchmark drop_assets of TrappistDropAssets  #113
• Lockdown Mode pallet Lockdown Mode pallet. #163
• Asset-registry refactoring asset-registry refactoring #173
• CI refactoring CI refactoring #174

The weights of the pallets were re-benchmarked to use Weights V2.

---

It also fixes Trappist and Stout UnitWeightCost to match the config of the parachain-template.

parameter_types! {
	....
	pub UnitWeightCost: Weight = Weight::from_parts(1_000_000_000, 64 * 1024);
	....
}

[stiiifff]

@valentinfernandez1 This is very difficult to review as-is. Having all PRs mixed up into one means the reviewer has to go back to the original PRs and do a very thorough job of re-examining everything.
My bad, maybe I should have mentioned it in the issue #184.
I would suggest to close it, and restart by opening one separate PR per the original PRs being back-ported. This will be much faster and less error-prone.

In each PR, please specify the original PR number and commit hash e.g.

run tests on CI (#174) (cherry picked from commit d826938)

[valentinfernandez1]

You are right, I didn't realized how difficult it was going to be to review so many different changes. I will split them into different PRs to simplify it.

Also it makes more sense this way since more things will need to be backported like #185 and this way it's going to be easier to identify each change.