KtLazyLightClass: do not store references to LightClassDataHolder

Otherwise any cached reference to light class can lead to severe memory leaks in IDE
    since LightClassBuiderResult holds GenerationState which holds ModuleDescriptor

compiler/light-classes/src/org/jetbrains/kotlin/asJava/classes/KtLazyLightClass.kt

@@ -16,12 +16,14 @@
 
 package org.jetbrains.kotlin.asJava.classes
 
+import com.intellij.psi.PsiClass
 import com.intellij.psi.PsiManager
 import org.jetbrains.kotlin.asJava.builder.LightClassData
 
 abstract class KtLazyLightClass(manager: PsiManager) : KtLightClassBase(manager) {
     abstract val lightClassData: LightClassData
 
+    override val clsDelegate: PsiClass by lazyPub { lightClassData.clsDelegate }
 
     override fun getOwnFields() = lightClassData.getOwnFields(this)
     override fun getOwnMethods() = lightClassData.getOwnMethods(this)

compiler/light-classes/src/org/jetbrains/kotlin/asJava/classes/KtLightClassForFacade.kt

@@ -194,12 +194,8 @@ class KtLightClassForFacade private constructor(
 
     override fun copy() = KtLightClassForFacade(manager, facadeClassFqName, lightClassDataCache, files)
 
-    override val lightClassData by lazyPub {
-        lightClassDataCache.value.findDataForFacade(facadeClassFqName)
-    }
-
-    override val clsDelegate: PsiClass
-        get() = lightClassData.clsDelegate
+    override val lightClassData
+        get() = lightClassDataCache.value.findDataForFacade(facadeClassFqName)
 
     override fun getNavigationElement() = files.iterator().next()
 

compiler/light-classes/src/org/jetbrains/kotlin/asJava/classes/KtLightClassForSourceDeclaration.kt

@@ -78,9 +78,8 @@ abstract class KtLightClassForSourceDeclaration(protected val classOrObject: KtC
     abstract override fun getParent(): PsiElement?
     abstract override fun getQualifiedName(): String?
 
-    override val clsDelegate: PsiClass get() = lightClassData.clsDelegate
-
-    override val lightClassData: LightClassData by lazyPub { findLightClassData() }
+    override val lightClassData: LightClassData
+        get() = findLightClassData()
 
     open protected fun findLightClassData() = getLightClassDataHolder().findDataForClassOrObject(classOrObject)