feat: Refactor Curve Executor not to use the router

We don't need to use all the functionalities of the Curve Router, only the swap type 1 (exchange). By bypassing the router we can save gas on 2 token transfers and with smaller calldata
A nice side effect is that the executor is much more readable and understandable now

--- don't change below this line ---
ENG-4305 Took 2 hours 25 minutes


Took 12 seconds

foundry/test/Constants.sol

@@ -130,9 +130,6 @@ contract Constants is Test, BaseConstants {
     bytes32 PANCAKEV3_POOL_CODE_INIT_HASH =
         0x6ce8eb472fa82df5469c6ab6d485f17c3ad13c8cd7af59b3d4a8026c5ce0f7e2;
 
-    // Curve router
-    address CURVE_ROUTER = 0x16C6521Dff6baB339122a0FE25a9116693265353;
-
     // Curve meta registry
     address CURVE_META_REGISTRY = 0xF98B45FA17DE75FB1aD0e7aFD971b0ca00e379fC;