feat: Support Curve ETH

Curve pools use a different address from ETH (native token)

- Pass Chain into the SwapEncoderBuilder and SwapEncoder
- Add native_token_curve_address and native_token_address to CurveSwapEncoder
- Added integration test for this curve case

--- don't change below this line ---
ENG-4306 Took 1 hour 4 minutes


Took 11 seconds

src/encoding/evm/swap_encoder/swap_encoder_registry.rs

@@ -38,7 +38,7 @@ impl SwapEncoderRegistry {
             .get(&chain.name)
             .ok_or(EncodingError::FatalError("No executors found for chain".to_string()))?;
         for (protocol, executor_address) in executors {
-            let builder = SwapEncoderBuilder::new(protocol, executor_address);
+            let builder = SwapEncoderBuilder::new(protocol, executor_address, chain.clone());
             let encoder = builder.build()?;
             encoders.insert(protocol.to_string(), encoder);
         }