feat: reorganize multichain deployer multisig scripts

Author: ypatil12

script/releases/MultisigDeployLib.sol

@@ -32,6 +32,16 @@ library MultisigDeployLib {
         address[] memory initialOwners,
         uint256 initialThreshold,
         uint256 salt
+    ) internal returns (address) {
+        return deployMultisigWithPaymentReceiver(initialOwners, initialThreshold, salt, address(0));
+    }
+
+    /// @notice Used to deploy a multisig with a payment receiver. This is used by multichain deployer on testnet chains.
+    function deployMultisigWithPaymentReceiver(
+        address[] memory initialOwners,
+        uint256 initialThreshold,
+        uint256 salt,
+        address paymentReceiver
     ) internal returns (address) {
         bytes memory initializerData = abi.encodeWithSelector(
             IMultisig.setup.selector,
@@ -42,7 +52,7 @@ library MultisigDeployLib {
             SAFE_FALLBACK_HANDLER, /* fallbackHandler */
             address(0), /* paymentToken */
             0, /* payment */
-            payable(address(0)) /* paymentReceiver */
+            payable(paymentReceiver) /* paymentReceiver */
         );
 
         address deployedMultisig =

script/releases/TOML.md

@@ -9,7 +9,7 @@ import "../../releases/Env.sol";
 /// @notice Deploy the multichain deployer multisig
 /// @dev This script is used to deploy the multichain deployer multisig on the destination chain
 /// @dev This script should ONLY be used for mainnet environments. Testnet environments should follow our notion guide
-/// TODO: Add a testnet version of this script
+/// @dev Use v1.6.0-multichain-deployer-testnet-preprod for testnet environments
 /// @dev The SAFE version is 1.4.1
 contract DeployMultichainDeployer is EOADeployer {
     using Env for *;