refactor: use cross-chain stream api

; Conflicts:
;	apps/kyberswap-interface/src/pages/CrossChainSwap/hooks/useCrossChainSwap.tsx

Author: piavgh

apps/kyberswap-interface/.env.production

@@ -48,4 +48,4 @@ VITE_ZAP_EARN_URL=https://zap-earn-service-v3.kyberengineering.io/api
 VITE_AFFILIATE_SERVICE=https://affiliate-service.kyberengineering.io/api
 VITE_SOLANA_RPC=https://solana.kyberengineering.io
 
-VITE_CROSSCHAIN_AGGREGATOR_API=https://crosschain-aggregator.kyberswap.com
+VITE_CROSSCHAIN_AGGREGATOR_API=https://pre-crosschain-aggregator.kyberengineering.io