[Gradle, JS] Add configureLibrary

^KT-41566 fixed

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/ir/KotlinJsBinaryContainer.kt

@@ -92,6 +92,30 @@ constructor(
         }
     )
 
+    // For Groovy DSL
+    @JvmOverloads
+    fun library(
+        compilation: KotlinJsCompilation = defaultCompilation
+    ): List<JsBinary> {
+        if (target is KotlinJsIrTarget) {
+            target.whenBrowserConfigured {
+                (this as KotlinJsIrSubTarget).produceLibrary()
+            }
+
+            target.whenNodejsConfigured {
+                (this as KotlinJsIrSubTarget).produceLibrary()
+            }
+
+            return createBinaries(
+                compilation = compilation,
+                jsBinaryType = KotlinJsBinaryType.LIBRARY,
+                create = ::Library
+            )
+        }
+
+        throw GradleException("Library can be produced only for IR compiler")
+    }
+
     internal fun getIrBinaries(
         mode: KotlinJsBinaryMode
     ): DomainObjectSet<JsIrBinary> =

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/ir/KotlinJsIrSubTarget.kt

@@ -79,6 +79,14 @@ abstract class KotlinJsIrSubTarget(
         produceExecutable
     }
 
+    private val produceLibrary: Unit by lazy {
+        configureLibrary()
+    }
+
+    internal fun produceLibrary() {
+        produceLibrary
+    }
+
     override fun testTask(body: KotlinJsTest.() -> Unit) {
         testRuns.getByName(KotlinTargetWithTests.DEFAULT_TEST_RUN_NAME).executionTask.configure(body)
     }
@@ -176,14 +184,21 @@ abstract class KotlinJsIrSubTarget(
     private fun configureMain(compilation: KotlinJsIrCompilation) {
         configureRun(compilation)
         configureBuild(compilation)
-        configureLibrary(compilation)
     }
 
     protected abstract fun configureRun(compilation: KotlinJsIrCompilation)
 
     protected abstract fun configureBuild(compilation: KotlinJsIrCompilation)
 
-    protected fun configureLibrary(compilation: KotlinJsIrCompilation) {
+    private fun configureLibrary() {
+        target.compilations.all { compilation ->
+            if (compilation.isMain()) {
+                configureLibrary(compilation)
+            }
+        }
+    }
+
+    private fun configureLibrary(compilation: KotlinJsIrCompilation) {
         val project = compilation.target.project
 
         val processResourcesTask = target.project.tasks.named(compilation.processResourcesTaskName)