Re-enable functional tests temporarily

This is to be able to run the integration test for macros in CI.

Author: neonichu

Package.swift

@@ -583,7 +583,7 @@ let package = Package(
             dependencies: ["Workspace", "SPMTestSupport"]
         ),
         // rdar://101868275 "error: cannot find 'XCTAssertEqual' in scope" can affect almost any functional test, so we flat out disable them all until we know what is going on
-        /*.testTarget(
+        .testTarget(
             name: "FunctionalTests",
             dependencies: [
                 "swift-build",
@@ -592,7 +592,7 @@ let package = Package(
                 "PackageModel",
                 "SPMTestSupport"
             ]
-        ),*/
+        ),
         .testTarget(
             name: "FunctionalPerformanceTests",
             dependencies: [

Tests/FunctionalTests/PluginTests.swift

@@ -463,6 +463,7 @@ class PluginTests: XCTestCase {
                         accessibleTools: [:],
                         writableDirectories: [pluginDir.appending(component: "output")],
                         readOnlyDirectories: [package.path],
+                        allowNetworkConnections: [],
                         pkgConfigDirectories: [],
                         fileSystem: localFileSystem,
                         observabilityScope: observability.topScope,
@@ -729,6 +730,7 @@ class PluginTests: XCTestCase {
                 accessibleTools: [:],
                 writableDirectories: [pluginDir.appending(component: "output")],
                 readOnlyDirectories: [package.path],
+                allowNetworkConnections: [],
                 pkgConfigDirectories: [],
                 fileSystem: localFileSystem,
                 observabilityScope: observability.topScope,