Allow specify schedule dispatch origin (#6387)

* allow specify schedule dispatch origin

* fix tests

* use caller origin for scheduled

* fix tests

* line width

* check origin for cancel

* line width

* fix some issues for benchmarking

* fix doc test

* another way to constraint origin

* fix build issues

* fix cancel

* line width

* fix benchmarks

* bump version

* enable runtime upgrade

* add migration code and test

* Update frame/scheduler/src/lib.rs

Co-authored-by: Gavin Wood <github@gavwood.com>

* expose migration method

* add notes

* bump version

* remove on_runtime_upgrade

* fix test

Co-authored-by: Gavin Wood <github@gavwood.com>

substrate/frame/scheduler/Cargo.toml

@@ -21,6 +21,7 @@ frame-benchmarking = { version = "2.0.0-rc4", default-features = false, path = "
 
 [dev-dependencies]
 sp-core = { version = "2.0.0-rc4", path = "../../primitives/core", default-features = false }
+substrate-test-utils = { version = "2.0.0-rc4", path = "../../test-utils" }
 
 [features]
 default = ["std"]
@@ -34,4 +35,8 @@ std = [
 	"sp-io/std",
 	"sp-std/std"
 ]
-runtime-benchmarks = ["frame-benchmarking"]
+runtime-benchmarks = [
+	"frame-benchmarking",
+	"frame-support/runtime-benchmarks",
+	"frame-system/runtime-benchmarks",
+]