[stdlib-mpp] Switch kotlin-stdlib project to multiplatform

#KT-56106

libraries/stdlib/build.gradle.kts

@@ -980,4 +980,13 @@ private class ComponentWithExternalVariants(
     override fun getVariants(): Set<SoftwareComponent> = externalComponents
 }
 
-// endregion
+// endregion
+
+// for legacy intra-project dependencies
+for (name in listOf("sources", "distSources")) {
+    val sourcesConfiguration = configurations.getOrCreate(name).apply {
+        isCanBeResolved = false
+        isCanBeConsumed = true
+    }
+    artifacts.add(sourcesConfiguration.name, tasks["jvmSourcesJar"])
+}

libraries/stdlib/js-v1/build.gradle

@@ -376,3 +376,11 @@ tasks.register("runMocha", NodeTask) {
 tasks.withType(org.jetbrains.kotlin.gradle.dsl.KotlinJsCompile) {
     kotlinOptions.freeCompilerArgs += "-Xforce-deprecated-legacy-compiler-usage"
 }
+
+if (BuildPropertiesExtKt.getKotlinStdlibMpp(project.kotlinBuildProperties)) {
+    afterEvaluate {
+        tasks.withType(AbstractPublishToMaven).configureEach {
+            enabled = false
+        }
+    }
+}

libraries/stdlib/jvm-minimal-for-test/build.gradle.kts

@@ -32,7 +32,7 @@ sourceSets {
 }
 
 val copySources by task<Sync> {
-    val stdlibProjectDir = project(":kotlin-stdlib").projectDir
+    val stdlibProjectDir = file("$rootDir/libraries/stdlib/jvm")
 
     from(stdlibProjectDir.resolve("runtime"))
         .include("kotlin/TypeAliases.kt",