contracts-bedrock: upgrade to multichain script

Implements a `forge script` to upgrade to the new L1 contracts.
This assumes that the proxy admin owner is a gnosis safe.

The test can be ran with the following command:

```bash
forge test -vv --contracts scripts/upgrades --mc Multichain --rpc-url $ETH_RPC_URL
```

Where `ETH_RPC_URL` is set to a goerli endpoint. Add `-vvvvv` instead of
`-vv` to see the execution that happens.

packages/contracts-bedrock/deploy-config/hardhat.json

@@ -38,5 +38,6 @@
   "numDeployConfirmations": 1,
   "eip1559Denominator": 50,
   "eip1559Elasticity": 10,
-  "l2GenesisRegolithTimeOffset": "0x0"
+  "l2GenesisRegolithTimeOffset": "0x0",
+  "systemConfigStartBlock": 0
 }

packages/contracts-bedrock/scripts/universal/SafeBuilder.sol

@@ -56,7 +56,13 @@ abstract contract SafeBuilder is EnhancedScript, GlobalConstants {
         if (block.chainid == OP_GOERLI) {
             safe = 0xE534ccA2753aCFbcDBCeB2291F596fc60495257e;
             proxyAdmin = 0x4200000000000000000000000000000000000018;
+        } else if (block.chainid == GOERLI) {
+            safe = 0xBc1233d0C3e6B5d53Ab455cF65A6623F6dCd7e4f;
+            proxyAdmin = 0x01d3670863c3F4b24D7b107900f0b75d4BbC6e0d;
         }
+        console.log("ChainID: %s", block.chainid);
+        console.log("Using Safe: %s", safe);
+        console.log("Using ProxyAdmin: %s", proxyAdmin);
         return run(safe, proxyAdmin);
     }