Create sp-weights crate to store weight primitives (#12219)

* Create sp-weights crate to store weight primitives

* Fix templates

* Fix templates

* Fixes

* Fixes

* cargo fmt

* Fixes

* Fixes

* Use deprecated type alias instead of deprecated unit types

* Use deprecated subtraits instead of deprecated hollow new traits

* Fixes

* Allow deprecation in macro expansion

* Add missing where clause during call macro expansion

* cargo fmt

* Fixes

* cargo fmt

* Fixes

* Fixes

* Fixes

* Fixes

* Move FRAME-specific weight files back to frame_support

* Fixes

* Update frame/support/src/dispatch.rs

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* Update frame/support/src/dispatch.rs

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* Update frame/support/src/dispatch.rs

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* Add missing header

* Rewrite module docs

* Fixes

* Fixes

* Fixes

* Fixes

* cargo fmt

Co-authored-by: Shawn Tabrizi <shawntabrizi@gmail.com>
Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

substrate/frame/executive/src/lib.rs

@@ -118,12 +118,12 @@
 
 use codec::{Codec, Encode};
 use frame_support::{
-	dispatch::PostDispatchInfo,
+	dispatch::{DispatchClass, DispatchInfo, GetDispatchInfo, PostDispatchInfo},
 	traits::{
 		EnsureInherentsAreFirst, ExecuteBlock, OffchainWorker, OnFinalize, OnIdle, OnInitialize,
 		OnRuntimeUpgrade,
 	},
-	weights::{DispatchClass, DispatchInfo, GetDispatchInfo, Weight},
+	weights::Weight,
 };
 use sp_runtime::{
 	generic::Digest,