Gradle: Don't use the deprecated "layout" method for Ivy repos

Issue #KT-30258 fixed

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/NewMultiplatformIT.kt

@@ -1303,6 +1303,8 @@ class NewMultiplatformIT : BaseGradleIT() {
             build("tasks") {
                 assertSuccessful()
                 assertTrue(output.contains("Kotlin/Native distribution: "))
+                // Check for KT-30258.
+                assertFalse(output.contains("Deprecated Gradle features were used in this build, making it incompatible with Gradle 6.0."))
             }
 
             build("tasks", "-Pkotlin.native.restrictedDistribution=true") {
@@ -1348,6 +1350,17 @@ class NewMultiplatformIT : BaseGradleIT() {
                 assertContains("Project property 'org.jetbrains.kotlin.native.version' is deprecated")
             }
         }
+
+        // Gradle 5.0 introduced a new API for Ivy repository layouts.
+        // MPP plugin uses this API to download K/N if Gradle version is >= 5.0.
+        // Check this too (see KT-30258).
+        with(Project("new-mpp-native-libraries", GradleVersionRequired.AtLeast("5.0"))) {
+            build("tasks", "-Pkotlin.native.version=1.3.50-eap-11606") {
+                assertSuccessful()
+                assertTrue(output.contains("Kotlin/Native distribution: "))
+                assertFalse(output.contains("Deprecated Gradle features were used in this build, making it incompatible with Gradle 6.0."))
+            }
+        }
     }
 
     @Test