Minor fix: handle kotlinOptions more carefully, store them where needed

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/kotlinCompilations.kt

@@ -281,9 +281,6 @@ abstract class AbstractKotlinCompilation<T : KotlinCommonOptions>(
     override val associateWith: List<KotlinCompilation<*>>
         get() = Collections.unmodifiableList(_associateWith.toList())
 
-    override val kotlinOptions: T
-        get() = TODO("Not yet implemented")
-
     override val project: Project
         get() = target.project
 

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/pm20/KotlinJvmVariant.kt

@@ -23,8 +23,7 @@ class KotlinJvmVariantCompilationData(val variant: KotlinJvmVariant) : KotlinVar
     override val owner: KotlinJvmVariant get() = variant
 
     // TODO pull out to the variant
-    override val kotlinOptions: KotlinJvmOptions
+    override val kotlinOptions: KotlinJvmOptions = KotlinJvmOptionsImpl()
-        get() = KotlinJvmOptionsImpl()
 }
 
 internal fun KotlinGradleVariant.ownModuleName(): String {

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/pm20/KotlinMetadataCompilationData.kt

@@ -150,8 +150,7 @@ internal open class KotlinNativeFragmentMetadataCompilationDataImpl(
     override val isActive: Boolean
         get() = fragment.isNativeShared()
 
-    override val kotlinOptions: NativeCompileOptions
+    override val kotlinOptions: NativeCompileOptions = NativeCompileOptions { languageSettings }
-        get() = NativeCompileOptions { languageSettings }
 
     override val konanTarget: KonanTarget
         get() {