Remove Ord impl for Weights V2 and add comparison fns (#12183)

* Remove Ord impl for Weights V2 and add comparison fns

* Remove TODO

* Update frame/multisig/src/lib.rs

Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Update frame/election-provider-multi-phase/src/unsigned.rs

Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Remove unused import

* cargo fmt

* Fix tests

* Fix more tests

* cargo fmt

* Fix more tests

* Update frame/contracts/src/wasm/mod.rs

Co-authored-by: Alexander Theißen <alex.theissen@me.com>

* Update weight benchmarking templates

Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: Alexander Theißen <alex.theissen@me.com>

substrate/frame/contracts/src/gas.rs

@@ -111,7 +111,7 @@ where
 
 		// NOTE that it is ok to allocate all available gas since it still ensured
 		// by `charge` that it doesn't reach zero.
-		if self.gas_left < amount {
+		if self.gas_left.any_lt(amount) {
 			Err(<Error<T>>::OutOfGas.into())
 		} else {
 			self.gas_left -= amount;