KT-45777: Change classpath-snapshot directory location

Incremental states for Kotlin compilation are stored inside the
`<project>/build/kotlin/<task-name>` directory. Previously, that
directory was @LocalState, so we had to keep the `classpath-snapshot`
@OutputDirectory outside it.

Now, that directory has been made a parent containing @OutputDirectory's
@LocalState's, so we can safely move the `classpath-snapshot` directory
to it.

Test: Existing tests should pass (location change has no functional impact)

^KT-45777 In Progress

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/internal/kapt/Kapt3KotlinGradleSubplugin.kt

@@ -245,8 +245,6 @@ class Kapt3GradleSubplugin @Inject internal constructor(private val registry: To
 
     private fun Kapt3SubpluginContext.getKaptIncrementalDataDir() = temporaryKaptDirectory("incrementalData")
 
-    private fun Kapt3SubpluginContext.getKaptClasspathSnapshotDir() = temporaryKaptDirectory("classpath-snapshot")
-
     private fun Kapt3SubpluginContext.getKaptIncrementalAnnotationProcessingCache() = temporaryKaptDirectory("incApCache")
 
     private fun Kapt3SubpluginContext.temporaryKaptDirectory(
@@ -672,12 +670,7 @@ class Kapt3GradleSubplugin @Inject internal constructor(private val registry: To
         val kaptTaskName = getKaptTaskName("kaptGenerateStubs")
         val kaptTaskProvider = project.registerTask<KaptGenerateStubsTask>(kaptTaskName)
 
-        val configurator = KaptGenerateStubsTask.Configurator(
-            kotlinCompile,
-            kotlinCompilation,
-            properties,
-            getKaptClasspathSnapshotDir()
-        )
+        val configurator = KaptGenerateStubsTask.Configurator(kotlinCompile, kotlinCompilation, properties)
         configurator.runAtConfigurationTime(kaptTaskProvider, project)
 
         kaptTaskProvider.configure { kaptTask ->

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/internal/kapt/KaptGenerateStubsTask.kt

@@ -47,13 +47,9 @@ abstract class KaptGenerateStubsTask @Inject constructor(
     internal class Configurator(
         private val kotlinCompileTaskProvider: TaskProvider<KotlinCompile>,
         kotlinCompilation: KotlinCompilationData<*>,
-        properties: PropertiesProvider,
-        private val classpathSnapshotDir: File
+        properties: PropertiesProvider
     ) : KotlinCompile.Configurator<KaptGenerateStubsTask>(kotlinCompilation, properties) {
 
-        override fun getClasspathSnapshotDir(task: KaptGenerateStubsTask): Provider<Directory> =
-            task.project.objects.directoryProperty().fileValue(classpathSnapshotDir)
-
         override fun configure(task: KaptGenerateStubsTask) {
             super.configure(task)
 

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/tasks/Tasks.kt

@@ -292,8 +292,8 @@ abstract class AbstractKotlinCompile<T : CommonCompilerArguments> @Inject constr
         private fun getKotlinBuildDir(task: T): Provider<Directory> =
             task.project.layout.buildDirectory.dir("$KOTLIN_BUILD_DIR_NAME/${task.name}")
 
-        protected open fun getClasspathSnapshotDir(task: T): Provider<Directory> =
-            task.project.layout.buildDirectory.dir("$KOTLIN_BUILD_DIR_NAME/classpath-snapshot/${task.name}")
+        protected fun getClasspathSnapshotDir(task: T): Provider<Directory> =
+            getKotlinBuildDir(task).map { it.dir("classpath-snapshot") }
     }
 
     init {