Add L2 deploy function

deploy/SkyDeploy.sol

@@ -38,4 +38,12 @@ library SkyDeploy {
         instance.sky    = _sky;
         instance.mkrSky = _mkrSky;
     }
+
+    function deployL2(
+        address deployer,
+        address owner
+    ) internal returns (address sky) {
+        sky = address(new Sky());
+        ScriptTools.switchOwner(sky, deployer, owner);
+    }
 }

test/integration/L2Deployment.t.sol

@@ -0,0 +1,38 @@
+// SPDX-FileCopyrightText: © 2024 Dai Foundation <www.daifoundation.org>
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+pragma solidity ^0.8.21;
+
+import "dss-test/DssTest.sol";
+
+import { SkyDeploy } from "deploy/SkyDeploy.sol";
+
+import { Sky } from "src/Sky.sol";
+
+contract DeploymentTest is DssTest {
+
+    address l2GovRelay = address(222);
+    address sky;
+
+    function setUp() public {
+        sky = SkyDeploy.deployL2(address(this), l2GovRelay);
+    }
+
+    function testSetUp() public {
+        assertEq(Sky(sky).wards(l2GovRelay), 1);
+        assertEq(Sky(sky).wards(address(this)), 0);
+    }
+}