Snowbridge: Unpaid execution when bridging to Ethereum (#8599)

### Context

Currently we use
[SovereignPaidRemoteExporter](https://github.com/paritytech/polkadot-sdk/blob/ff5c67c8a3d60ccb3f0af114a07db8f4bec485a0/cumulus/parachains/runtimes/assets/asset-hub-westend/src/xcm_config.rs#L457-L464),
which is unnecessary since all fees in Snowbridge V2 will be estimated
on the fly and injected into the XCM.

Resolves: https://linear.app/snowfork/issue/SNO-1510

---------

Co-authored-by: Branislav Kontur <bkontur@gmail.com>
Co-authored-by: Adrian Catangiu <adrian@parity.io>

Author: 3 people

bridges/snowbridge/runtime/runtime-common/src/lib.rs

@@ -4,9 +4,5 @@
 //!
 //! Common traits and types shared by runtimes.
 #![cfg_attr(not(feature = "std"), no_std)]
-#[cfg(test)]
-mod tests;
-pub mod v1;
 pub mod v2;
-pub use v1::fee_handler::XcmExportFeeToSibling;
 pub use v2::register_token::{ForeignAssetOwner, LocalAssetOwner};

bridges/snowbridge/runtime/runtime-common/src/tests.rs

@@ -306,6 +306,7 @@ pub fn send_unpaid_transfer_token_message<Runtime, XcmConfig>(
 		+ pallet_collator_selection::Config
 		+ cumulus_pallet_parachain_system::Config
 		+ snowbridge_pallet_outbound_queue::Config
+		+ snowbridge_pallet_system::Config
 		+ pallet_timestamp::Config,
 	XcmConfig: xcm_executor::Config,
 	ValidatorIdOf<Runtime>: From<AccountIdOf<Runtime>>,
@@ -319,12 +320,9 @@ pub fn send_unpaid_transfer_token_message<Runtime, XcmConfig>(
 		.with_tracing()
 		.build()
 		.execute_with(|| {
-			let asset_hub_sovereign_account =
-				snowbridge_core::sibling_sovereign_account::<Runtime>(assethub_parachain_id.into());
-
-			<pallet_balances::Pallet<Runtime>>::mint_into(
-				&asset_hub_sovereign_account,
-				4000000000u32.into(),
+			<snowbridge_pallet_system::Pallet<Runtime>>::initialize(
+				runtime_para_id.into(),
+				assethub_parachain_id.into(),
 			)
 			.unwrap();
 
@@ -370,8 +368,7 @@ pub fn send_unpaid_transfer_token_message<Runtime, XcmConfig>(
 				RuntimeHelper::<Runtime>::xcm_max_weight(XcmReceivedFrom::Sibling),
 				Weight::zero(),
 			);
-			// check error is barrier
-			assert_err!(outcome.ensure_complete(), XcmError::Barrier);
+			assert_ok!(outcome.ensure_complete());
 		});
 }