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/Cargo.toml

@@ -26,6 +26,7 @@ sp-core = { version = "6.0.0", default-features = false, path = "../../primitive
 sp-arithmetic = { version = "5.0.0", default-features = false, path = "../../primitives/arithmetic" }
 sp-inherents = { version = "4.0.0-dev", default-features = false, path = "../../primitives/inherents" }
 sp-staking = { version = "4.0.0-dev", default-features = false, path = "../../primitives/staking" }
+sp-weights = { version = "4.0.0", default-features = false, path = "../../primitives/weights" }
 tt-call = "1.0.8"
 frame-support-procedural = { version = "4.0.0-dev", default-features = false, path = "./procedural" }
 paste = "1.0"
@@ -62,6 +63,7 @@ std = [
 	"sp-inherents/std",
 	"sp-staking/std",
 	"sp-state-machine",
+	"sp-weights/std",
 	"frame-support-procedural/std",
 	"log/std",
 ]