Save the ERC20 Minter in Deployment Config (#360)

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## Description

Make sure to save/load erc20 minter from the deployment config, so that when we run `copy-deployed-contracts` its not removed

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- [ ] This changes the ABI/API

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packages/1155-deployments/src/DeploymentConfig.sol

@@ -38,6 +38,8 @@ struct Deployment {
     address preminterProxy;
     /// @notice Upgrade gate
     address upgradeGate;
+    /// @notice erc20 minter
+    address erc20Minter;
 }
 
 abstract contract DeploymentConfig is Script {
@@ -65,6 +67,7 @@ abstract contract DeploymentConfig is Script {
     string constant PREMINTER_PROXY = "PREMINTER_PROXY";
     string constant PREMINTER_IMPL = "PREMINTER_IMPL";
     string constant UPGRADE_GATE = "UPGRADE_GATE";
+    string constant ERC20_MINTER = "ERC20_MINTER";
 
     /// @notice Return a prefixed key for reading with a ".".
     /// @param key key to prefix
@@ -106,6 +109,7 @@ abstract contract DeploymentConfig is Script {
         deployment.preminterImpl = readAddressOrDefaultToZero(json, PREMINTER_IMPL);
         deployment.preminterProxy = readAddressOrDefaultToZero(json, PREMINTER_PROXY);
         deployment.upgradeGate = readAddressOrDefaultToZero(json, UPGRADE_GATE);
+        deployment.erc20Minter = readAddressOrDefaultToZero(json, ERC20_MINTER);
     }
 
     function getDeterminsticMintsManagerAddress() internal view returns (address) {

packages/1155-deployments/src/ZoraDeployerBase.sol

@@ -36,6 +36,7 @@ abstract contract ZoraDeployerBase is DeploymentTestingUtils, ScriptDeploymentCo
         vm.serializeAddress(deploymentJsonKey, PREMINTER_PROXY, deployment.preminterProxy);
         vm.serializeAddress(deploymentJsonKey, PREMINTER_IMPL, deployment.preminterImpl);
         vm.serializeAddress(deploymentJsonKey, UPGRADE_GATE, deployment.upgradeGate);
+        vm.serializeAddress(deploymentJsonKey, ERC20_MINTER, deployment.erc20Minter);
         deploymentJson = vm.serializeAddress(deploymentJsonKey, FACTORY_PROXY, deployment.factoryProxy);
     }