Don't create the Kapt generate stubs output dir in lazy initializer

Creating a directory in the property getter interferes with Gradle cache
 outputs snapshotting, resulting in build cache being disabled for the
 task with the following info message:

 Caching disabled for task ':app:kaptGenerateStubsKotlin': Gradle does
 not know how file 'build/tmp/kapt3/incrementalData/main' was created
 (output property 'destinationDir'). Task output caching requires exclusive
 access to output paths to guarantee correctness.

 As Gradle automatically creates any @OutputDirectory, we don't need
 to create it at the task initialization phase.

Author: h0tk3y

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

@@ -162,15 +162,17 @@ class Kapt3KotlinGradleSubplugin : KotlinGradleSubplugin<KotlinCompile> {
 
     override fun isApplicable(project: Project, task: AbstractCompile) = task is KotlinCompile && Kapt3GradleSubplugin.isEnabled(project)
 
-    private fun Kapt3SubpluginContext.getKaptStubsDir() = createAndReturnTemporaryKaptDirectory("stubs")
+    private fun Kapt3SubpluginContext.getKaptStubsDir() = temporaryKaptDirectory("stubs")
 
-    private fun Kapt3SubpluginContext.getKaptIncrementalDataDir() = createAndReturnTemporaryKaptDirectory("incrementalData")
+    private fun Kapt3SubpluginContext.getKaptIncrementalDataDir() = temporaryKaptDirectory("incrementalData", doMkDirs = false)
 
-    private fun Kapt3SubpluginContext.getKaptIncrementalAnnotationProcessingCache() = createAndReturnTemporaryKaptDirectory("incApCache")
+    private fun Kapt3SubpluginContext.getKaptIncrementalAnnotationProcessingCache() = temporaryKaptDirectory("incApCache")
 
-    private fun Kapt3SubpluginContext.createAndReturnTemporaryKaptDirectory(name: String): File {
+    private fun Kapt3SubpluginContext.temporaryKaptDirectory(name: String, doMkDirs: Boolean = true): File {
         val dir = File(project.buildDir, "tmp/kapt3/$name/$sourceSetName")
-        dir.mkdirs()
+        if (doMkDirs) {
+            dir.mkdirs()
+        }
         return dir
     }