fix calldatalen in calldata{copy,load} for contract deployment (#1593)

### Description

The 'calldata' for a call with Kind::Create/Ceate2, should always be
empty. We handled this correctly for create/create2 opcode. But for
tx.to == None deployment, it was wrong. This PR fixes this problem.

### Issue Link

[_link issue here_]

### Type of change

- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] This change requires a documentation update

bus-mapping/src/circuit_input_builder/transaction.rs

@@ -241,7 +241,7 @@ impl Transaction {
                 code_hash,
                 depth: 1,
                 value: eth_tx.value,
-                call_data_length: eth_tx.input.len().try_into().unwrap(),
+                call_data_length: 0,
                 ..Default::default()
             }
         };

zkevm-circuits/src/evm_circuit/execution/calldatacopy.rs

@@ -199,7 +199,14 @@ impl<F: Field> ExecutionGadget<F> for CallDataCopyGadget<F> {
 
         // Call data length and call data offset
         let (call_data_length, call_data_offset) = if call.is_root {
-            (tx.call_data.len() as u64, 0_u64)
+            (
+                if tx.is_create() {
+                    0
+                } else {
+                    tx.call_data.len() as u64
+                },
+                0_u64,
+            )
         } else {
             (call.call_data_length, call.call_data_offset)
         };

zkevm-circuits/src/evm_circuit/execution/calldataload.rs

@@ -213,7 +213,15 @@ impl<F: Field> ExecutionGadget<F> for CallDataLoadGadget<F> {
 
         // Assign to the buffer reader gadget.
         let (src_id, call_data_offset, call_data_length) = if call.is_root {
-            (tx.id, 0, tx.call_data.len() as u64)
+            (
+                tx.id,
+                0,
+                if tx.is_create() {
+                    0
+                } else {
+                    tx.call_data.len() as u64
+                },
+            )
         } else {
             (
                 call.caller_id as u64,
@@ -249,7 +257,7 @@ impl<F: Field> ExecutionGadget<F> for CallDataLoadGadget<F> {
             for (i, byte) in calldata_bytes.iter_mut().enumerate() {
                 if call.is_root {
                     // Fetch from tx call data.
-                    if src_addr + (i as u64) < tx.call_data.len() as u64 {
+                    if src_addr + (i as u64) < call_data_length {
                         *byte = tx.call_data[src_addr as usize + i];
                     }
                 } else {