contracts: Fix L-01 use _from instead of msg.sender

packages/contracts-bedrock/.gas-snapshot

@@ -75,8 +75,8 @@ L2StandardBridge_Test:test_finalizeDeposit() (gas: 93169)
 L2StandardBridge_Test:test_finalizeDeposit_failsToCompleteOutboundTransfer() (gas: 140106)
 L2StandardBridge_Test:test_initialize() (gas: 14812)
 L2StandardBridge_Test:test_receive() (gas: 136415)
-L2StandardBridge_Test:test_withdraw() (gas: 352626)
-L2StandardBridge_Test:test_withdrawTo() (gas: 353477)
+L2StandardBridge_Test:test_withdraw() (gas: 352632)
+L2StandardBridge_Test:test_withdrawTo() (gas: 353484)
 L2ToL1MessagePasserTest:test_burn() (gas: 112046)
 L2ToL1MessagePasserTest:test_initiateWithdrawal_fromContract() (gas: 67890)
 L2ToL1MessagePasserTest:test_initiateWithdrawal_fromEOA() (gas: 74851)
@@ -161,4 +161,4 @@ SequencerFeeVault_Test:test_constructor() (gas: 7611)
 SequencerFeeVault_Test:test_minWithdrawalAmount() (gas: 5429)
 SequencerFeeVault_Test:test_receive() (gas: 17280)
 SequencerFeeVault_Test:test_revertWithdraw() (gas: 9245)
-SequencerFeeVault_Test:test_withdraw() (gas: 147274)
+SequencerFeeVault_Test:test_withdraw() (gas: 147275)

packages/contracts-bedrock/contracts/L2/L2StandardBridge.sol

@@ -172,6 +172,6 @@ contract L2StandardBridge is StandardBridge {
         } else {
             _initiateBridgeERC20(_l2Token, l1Token, _from, _to, _amount, _minGasLimit, _data);
         }
-        emit WithdrawalInitiated(l1Token, _l2Token, msg.sender, _to, _amount, _data);
+        emit WithdrawalInitiated(l1Token, _l2Token, _from, _to, _amount, _data);
     }
 }

packages/contracts-bedrock/contracts/universal/StandardBridge.sol

@@ -318,7 +318,7 @@ abstract contract StandardBridge {
                 "Wrong remote token for Optimism Mintable ERC20 local token"
             );
 
-            OptimismMintableERC20(_localToken).burn(msg.sender, _amount);
+            OptimismMintableERC20(_localToken).burn(_from, _amount);
         } else {
             // TODO: Do we need to confirm that the transfer was successful?
             IERC20(_localToken).safeTransferFrom(_from, address(this), _amount);