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/support/test/tests/pallet_instance.rs

@@ -16,11 +16,10 @@
 // limitations under the License.
 
 use frame_support::{
-	dispatch::UnfilteredDispatchable,
+	dispatch::{DispatchClass, DispatchInfo, GetDispatchInfo, Pays, UnfilteredDispatchable},
 	pallet_prelude::ValueQuery,
 	storage::unhashed,
 	traits::{ConstU32, GetCallName, OnFinalize, OnGenesis, OnInitialize, OnRuntimeUpgrade},
-	weights::{DispatchClass, DispatchInfo, GetDispatchInfo, Pays},
 };
 use sp_io::{
 	hashing::{blake2_128, twox_128, twox_64},