Add xcm relaychain token transfer integration test

[Chralt98]

What does it do?

It adds an integration test for the xcm transfer of relaychain token to the zeitgeist parachain.

What important points should reviewers know?

Is there something left for follow-up PRs?

What alternative implementations were considered?

Are there relevant PRs or issues?

References

[Chralt98]

RpcError: 1011: Error: wasm `unreachable` instruction executed
 ❯ checkError node_modules/.pnpm/@polkadot+rpc-provider@10.13.1/node_modules/@polkadot/rpc-provider/coder/index.js:19:15
 ❯ RpcCoder.decodeResponse node_modules/.pnpm/@polkadot+rpc-provider@10.13.1/node_modules/@polkadot/rpc-provider/coder/index.js:35:9
 ❯ WsProvider.__internal__onSocketMessageResult node_modules/.pnpm/@polkadot+rpc-provider@10.13.1/node_modules/@polkadot/rpc-provider/ws/index.js:409:51
 ❯ WebSocket.__internal__onSocketMessage node_modules/.pnpm/@polkadot+rpc-provider@10.13.1/node_modules/@polkadot/rpc-provider/ws/index.js:398:20
 ❯ callListener node_modules/.pnpm/ws@8.18.0/node_modules/ws/lib/event-target.js:290:14
 ❯ WebSocket.onMessage node_modules/.pnpm/ws@8.18.0/node_modules/ws/lib/event-target.js:209:9
 ❯ WebSocket.emit node:events:519:28
 ❯ Receiver.receiverOnMessage node_modules/.pnpm/ws@8.18.0/node_modules/ws/lib/websocket.js:1220:20
 ❯ Receiver.emit node:events:519:28
 ❯ Receiver.dataMessage node_modules/.pnpm/ws@8.18.0/node_modules/ws/lib/receiver.js:596:14

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Serialized Error: { code: 1011, data: undefined }

runtime  ERROR: panicked at /build/relay/polkadot/src/lib.rs:2006:1:
Bad input data provided to validate_transaction: Codec error

Unfortunately, the added test for sending ROC token to the Battery Station parachain results in an error. It looks like a scale codec error.

[mergify]

This pull request is now in conflicts. Could you fix it @Chralt98? 🙏