Add WeightInfo to all pallets with benchmarks. (#6575)

* Start adding weight info

* More weightinfo

* finish weight info

* more fixes

* inital update of node runtime

* fix the rest of the compilation

* update balances

* add docs

* fix balances tests

* Fix more tests

* Fix compile

* Fix pallet-evm tests

substrate/frame/example/src/lib.rs

@@ -768,6 +768,7 @@ mod tests {
 		type AccountData = pallet_balances::AccountData<u64>;
 		type OnNewAccount = ();
 		type OnKilledAccount = ();
+		type SystemWeightInfo = ();
 	}
 	parameter_types! {
 		pub const ExistentialDeposit: u64 = 1;
@@ -778,6 +779,7 @@ mod tests {
 		type Event = ();
 		type ExistentialDeposit = ExistentialDeposit;
 		type AccountStore = System;
+		type WeightInfo = ();
 	}
 	impl Trait for Test {
 		type Event = ();