Update Balances Pallet to use WeightInfo (#6610)

* Update balance benchmarks

* Update weight functions

* Remove user component

* make componentless

* Add support for `#[extra]` tag on benchmarks

* Update balances completely

* Apply suggestions from code review

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

* Fix some tests

* Maybe fix to test. Need approval from @tomusdrw this is okay

* Make test better

* keep weights conservative

* Update macro for merge master

* Add headers

* Apply suggestions from code review

Co-authored-by: Alexander Popiak <alexander.popiak@parity.io>

Co-authored-by: Alexander Theißen <alex.theissen@me.com>
Co-authored-by: Alexander Popiak <alexander.popiak@parity.io>

substrate/bin/node/runtime/src/weights/mod.rs

@@ -0,0 +1,18 @@
+// Copyright (C) 2020 Parity Technologies (UK) Ltd.
+// SPDX-License-Identifier: Apache-2.0
+
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 	http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//! A list of the different weight modules for our runtime.
+
+pub mod pallet_balances;