allow treasury to do reserve asset transfers (#1447)

This pr resolves https://github.com/paritytech/polkadot-sdk/issues/1428.

*Added only to Kusama for now*

I did raise it
[here](https://github.com/polkadot-fellows/runtimes/pull/19) and we
discussed creating a chopsticks test to run an end-to-end test

however, to do that I will need a build agent/custom runner that is
powerful enough to run the build

I will be doing that separately as I still think having chopsticks test
your runtime with each commit will be very powerful and extremely useful
for the ecosystem

For now I have used XCM simulator and replicated what the other reserve
tests do

---------

Co-authored-by: Gavin Wood <github@gavwood.com>
Co-authored-by: Francisco Aguirre <franciscoaguirreperez@gmail.com>
Co-authored-by: Branislav Kontur <bkontur@gmail.com>
Co-authored-by: Bastian Köcher <git@kchr.de>

polkadot/xcm/xcm-builder/src/lib.rs

@@ -33,9 +33,9 @@ pub use location_conversion::{
 	Account32Hash, AccountId32Aliases, AccountKey20Aliases, AliasesIntoAccountId32,
 	ChildParachainConvertsVia, DescribeAccountId32Terminal, DescribeAccountIdTerminal,
 	DescribeAccountKey20Terminal, DescribeAllTerminal, DescribeBodyTerminal, DescribeFamily,
-	DescribeLocation, DescribePalletTerminal, DescribeTerminus, GlobalConsensusConvertsFor,
-	GlobalConsensusParachainConvertsFor, HashedDescription, ParentIsPreset,
-	SiblingParachainConvertsVia,
+	DescribeLocation, DescribePalletTerminal, DescribeTerminus, DescribeTreasuryVoiceTerminal,
+	GlobalConsensusConvertsFor, GlobalConsensusParachainConvertsFor, HashedDescription,
+	LocalTreasuryVoiceConvertsVia, ParentIsPreset, SiblingParachainConvertsVia,
 };
 
 mod origin_conversion;