[Gradle] Restore 'KotlinTargetHierarchyDsl' for easier transition to hierarchy templates

^KT-60596 Verification Pending

libraries/tools/kotlin-gradle-plugin-api/api/kotlin-gradle-plugin-api.api

@@ -525,6 +525,17 @@ public abstract interface class org/jetbrains/kotlin/gradle/dsl/KotlinNativeXCFr
 	public abstract fun targets ([Lorg/jetbrains/kotlin/konan/target/KonanTarget;)V
 }
 
+public abstract interface class org/jetbrains/kotlin/gradle/dsl/KotlinTargetHierarchyDsl {
+	public abstract fun apply (Lorg/jetbrains/kotlin/gradle/plugin/KotlinHierarchyTemplate;Lkotlin/jvm/functions/Function1;)V
+	public abstract fun custom (Lkotlin/jvm/functions/Function1;)V
+	public abstract fun default (Lkotlin/jvm/functions/Function1;)V
+}
+
+public final class org/jetbrains/kotlin/gradle/dsl/KotlinTargetHierarchyDsl$DefaultImpls {
+	public static synthetic fun apply$default (Lorg/jetbrains/kotlin/gradle/dsl/KotlinTargetHierarchyDsl;Lorg/jetbrains/kotlin/gradle/plugin/KotlinHierarchyTemplate;Lkotlin/jvm/functions/Function1;ILjava/lang/Object;)V
+	public static synthetic fun default$default (Lorg/jetbrains/kotlin/gradle/dsl/KotlinTargetHierarchyDsl;Lkotlin/jvm/functions/Function1;ILjava/lang/Object;)V
+}
+
 public abstract interface class org/jetbrains/kotlin/gradle/dsl/KotlinTopLevelExtensionConfig {
 	public abstract fun explicitApi ()V
 	public abstract fun explicitApiWarning ()V

libraries/tools/kotlin-gradle-plugin-api/src/common/kotlin/org/jetbrains/kotlin/gradle/dsl/KotlinTargetHierarchyDsl.kt

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.gradle.dsl
+
+/*
+ * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+import org.jetbrains.kotlin.gradle.ExperimentalKotlinGradlePluginApi
+import org.jetbrains.kotlin.gradle.plugin.KotlinHierarchyBuilder
+import org.jetbrains.kotlin.gradle.plugin.KotlinHierarchyTemplate
+
+@Deprecated("Use 'KotlinHierarchyTemplate' instead")
+@ExperimentalKotlinGradlePluginApi
+interface KotlinTargetHierarchyDsl {
+    fun apply(hierarchyDescriptor: KotlinHierarchyTemplate, describeExtension: (KotlinHierarchyBuilder.Root.() -> Unit)? = null)
+    fun default(describeExtension: (KotlinHierarchyBuilder.Root.() -> Unit)? = null)
+    fun custom(describe: KotlinHierarchyBuilder.Root.() -> Unit)
+}

libraries/tools/kotlin-gradle-plugin-api/src/common/kotlin/org/jetbrains/kotlin/gradle/plugin/KotlinHierarchyTemplate.kt

@@ -88,6 +88,15 @@ internal class KotlinHierarchyTemplateImpl(
     fun layout(builder: KotlinHierarchyBuilder.Root) {
         describe(builder)
     }
+
+    override fun hashCode(): Int {
+        return describe.hashCode()
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (other !is KotlinHierarchyTemplateImpl) return false
+        return this.describe == other.describe
+    }
 }
 
 /*