contracts: Add setL1BlockValues gas test (#2576)

This adds a normal (non-fuzzing) test of setL1BlockValues with the goal
of determining how much gas is used by the function.

contracts-bedrock/.gas-snapshot

@@ -3,7 +3,8 @@ L1BlockTest:test_basefee() (gas: 7575)
 L1BlockTest:test_hash() (gas: 7552)
 L1BlockTest:test_number() (gas: 7651)
 L1BlockTest:test_sequenceNumber() (gas: 7585)
-L1BlockTest:test_timestamp() (gas: 7661)
+L1BlockTest:test_timestamp() (gas: 7683)
+L1BlockTest:test_updateValues() (gas: 28215)
 L1BlockNumberTest:test_fallback() (gas: 10755)
 L1BlockNumberTest:test_getL1BlockNumber() (gas: 10589)
 L1BlockNumberTest:test_receive() (gas: 17418)

contracts-bedrock/contracts/test/L1Block.t.sol

@@ -45,4 +45,9 @@ contract L1BlockTest is CommonTest {
     function test_sequenceNumber() external {
         assertEq(lb.sequenceNumber(), uint64(4));
     }
+
+    function test_updateValues() external {
+        vm.prank(depositor);
+        lb.setL1BlockValues(type(uint64).max, type(uint64).max, type(uint256).max, keccak256(abi.encode(1)), type(uint64).max);
+    }
 }