Purify Contains, add IsInVec, All and SortedMembers (#8589)

* IsInVec

* Purify `Contains`, introduce SortedMembers

substrate/frame/system/src/lib.rs

@@ -87,7 +87,7 @@ use sp_core::{ChangesTrieConfiguration, storage::well_known_keys};
 use frame_support::{
 	Parameter, storage,
 	traits::{
-		Contains, Get, PalletInfo, OnNewAccount, OnKilledAccount, HandleLifetime,
+		SortedMembers, Get, PalletInfo, OnNewAccount, OnKilledAccount, HandleLifetime,
 		StoredMap, EnsureOrigin, OriginTrait, Filter,
 	},
 	weights::{
@@ -870,7 +870,7 @@ impl<
 pub struct EnsureSignedBy<Who, AccountId>(sp_std::marker::PhantomData<(Who, AccountId)>);
 impl<
 	O: Into<Result<RawOrigin<AccountId>, O>> + From<RawOrigin<AccountId>>,
-	Who: Contains<AccountId>,
+	Who: SortedMembers<AccountId>,
 	AccountId: PartialEq + Clone + Ord + Default,
 > EnsureOrigin<O> for EnsureSignedBy<Who, AccountId> {
 	type Success = AccountId;