Avoid redundant calldata bytes extension (#173)

As @MartinquaXD
[noticed](#171 (comment)):
> This calldata needed to be changed (removed 24 bytes or 48 characters)
due to removing the extra encoding logic in the Permit2 handling. Turns
out that was not needed at all - not sure what made me believe that was
needed before.
To verify I used this
[page](https://calldata.swiss-knife.xyz/decoder?calldata=0x87517c45000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2000000000000000000000000136f1efcc3f8f88516b9e94110d56fdbfb1778d10000000000000000000000000000000000000000000000000de0b6b3a76400000000000000000000000000000000000000000000000000000000000000000000).
Pasting the shortened calldata still results in correct decoding but
removing 1 more character causes the decoding to fail.
This did not cause any issues so far because the EVM ignores additional
bytes instead of throwing an error.

This change has been extracted into a separate PR.

---------

Co-authored-by: Your Name <your-email@example.com>

Author: squadgazzz

src/infra/dex/balancer/v3.rs

@@ -43,19 +43,14 @@ impl Permit2 {
 
         // Transfers are done via Permit2, so we approve the balancer v3 router to spend
         // the input tokens
-        let mut calldata = Permit2Contract::Permit2::approveCall {
+        let calldata = Permit2Contract::Permit2::approveCall {
             token: token_in,
             spender,
             amount: U160::from(max_input),
             expiration,
         }
         .abi_encode();
 
-        // As alloy encodes the last argument (expiration) as a U48 (6 bytes),
-        // we need to add 24 bytes to pad it into a U256 (32 bytes) (which is the
-        // expected for EVM arguments)
-        calldata.extend_from_slice(&[0u8; 24]);
-
         dex::Call { to, calldata }
     }
 }

src/tests/balancer/market_order.rs

@@ -334,7 +334,7 @@ async fn sell_v3() {
                             "token": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2"
                           }
                         ],
-                        "callData": "0x87517c45000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2000000000000000000000000136f1efcc3f8f88516b9e94110d56fdbfb1778d10000000000000000000000000000000000000000000000000de0b6b3a76400000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
+                        "callData": "0x87517c45000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2000000000000000000000000136f1efcc3f8f88516b9e94110d56fdbfb1778d10000000000000000000000000000000000000000000000000de0b6b3a76400000000000000000000000000000000000000000000000000000000000000000000",
                         "inputs": [
                           {
                             "amount": "1000000000000000000",