[Gradle, Test] Move mpp-sources-publication test data

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

@@ -729,7 +729,7 @@ class HierarchicalMppIT : KGPBaseTest() {
     @DisplayName("Test sources publication of a multiplatform library")
     fun testSourcesPublication(gradleVersion: GradleVersion, @TempDir tempDir: Path) {
         project(
-            "mpp-sources-publication",
+            "mpp-sources-publication/producer",
             gradleVersion = gradleVersion,
             localRepoDir = tempDir
         ).run {

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/mpp-sources-publication/producer/settings.gradle.kts

@@ -0,0 +1,14 @@
+pluginManagement {
+	repositories {
+		mavenLocal()
+		gradlePluginPortal()
+	}
+	plugins {
+		val kotlin_version: String by settings
+		val test_fixes_version: String by settings
+		kotlin("multiplatform").version(kotlin_version)
+		id("org.jetbrains.kotlin.test.fixes.android") version test_fixes_version
+	}
+}
+
+rootProject.name = "lib"