Benchmark Treasury Pallet (#5287)

* Start benchmarks

* try_origin or root

* More benches

* stuck

* Custom trait functions for benchmarks

* finish benchmarks

* Bump impl

* More comments

* Bump spec

* Remove import

* Update frame/elections-phragmen/src/lib.rs

Co-Authored-By: thiolliere <gui.thiolliere@gmail.com>

* Update frame/support/src/traits.rs

Co-Authored-By: thiolliere <gui.thiolliere@gmail.com>

* Fix merge

Co-authored-by: thiolliere <gui.thiolliere@gmail.com>

substrate/bin/node/runtime/src/lib.rs

@@ -899,6 +899,13 @@ impl_runtime_apis! {
 					steps,
 					repeat,
 				),
+				b"pallet-treasury" | b"treasury" => Treasury::run_benchmark(
+					extrinsic,
+					lowest_range_values,
+					highest_range_values,
+					steps,
+					repeat,
+				),
 				b"pallet-vesting" | b"vesting" => Vesting::run_benchmark(
 					extrinsic,
 					lowest_range_values,