feat(ctb): Expose `l2BlockNumberChallenger` (#10463)

## Overview

Exposes the `l2BlockNumberChallenger` in the fault dispute game.

packages/contracts-bedrock/semver-lock.json

@@ -128,8 +128,8 @@
     "sourceCodeHash": "0x918c395ac5d77357f2551616aad0613e68893862edd14e554623eb16ee6ba148"
   },
   "src/dispute/FaultDisputeGame.sol": {
-    "initCodeHash": "0x165b86287737cc00981215510f8f5fcd9197c953cefe14aa5d355fa2c88d257e",
-    "sourceCodeHash": "0x5f1d3e7cbb1a705ad3b297313178bd7a8acfa2ddf1bde68be1b0b5468942d003"
+    "initCodeHash": "0x923d5c668370010e84a0318a813c2979962b1007d692344f5496bcda6fa85e53",
+    "sourceCodeHash": "0xf77ee4322aeb08559469c3bd42ec266547a170b48ea1cffcf633de80543f3c09"
   },
   "src/dispute/weth/DelayedWETH.sol": {
     "initCodeHash": "0xb9bbe005874922cd8f499e7a0a092967cfca03e012c1e41912b0c77481c71777",

packages/contracts-bedrock/snapshots/abi/FaultDisputeGame.json

@@ -484,6 +484,19 @@
     "stateMutability": "view",
     "type": "function"
   },
+  {
+    "inputs": [],
+    "name": "l2BlockNumberChallenger",
+    "outputs": [
+      {
+        "internalType": "address",
+        "name": "",
+        "type": "address"
+      }
+    ],
+    "stateMutability": "view",
+    "type": "function"
+  },
   {
     "inputs": [],
     "name": "l2ChainId",

packages/contracts-bedrock/snapshots/abi/PermissionedDisputeGame.json

@@ -507,6 +507,19 @@
     "stateMutability": "view",
     "type": "function"
   },
+  {
+    "inputs": [],
+    "name": "l2BlockNumberChallenger",
+    "outputs": [
+      {
+        "internalType": "address",
+        "name": "",
+        "type": "address"
+      }
+    ],
+    "stateMutability": "view",
+    "type": "function"
+  },
   {
     "inputs": [],
     "name": "l2ChainId",

packages/contracts-bedrock/src/dispute/FaultDisputeGame.sol

@@ -69,8 +69,8 @@ contract FaultDisputeGame is IFaultDisputeGame, Clone, ISemver {
     uint256 internal constant HEADER_BLOCK_NUMBER_INDEX = 8;
 
     /// @notice Semantic version.
-    /// @custom:semver 1.1.0
-    string public constant version = "1.1.0";
+    /// @custom:semver 1.1.1
+    string public constant version = "1.1.1";
 
     /// @notice The starting timestamp of the game
     Timestamp public createdAt;
@@ -89,7 +89,7 @@ contract FaultDisputeGame is IFaultDisputeGame, Clone, ISemver {
 
     /// @notice The challenger of the L2 block number claim. Should always be `address(0)` if `l2BlockNumberChallenged`
     ///         is `false`. Should be the address of the challenger if `l2BlockNumberChallenged` is `true`.
-    address internal l2BlockNumberChallenger;
+    address public l2BlockNumberChallenger;
 
     /// @notice An append-only array of all claims made during the dispute game.
     ClaimData[] public claimData;