[NewIC] Fix build failure when enabling new IC in projects using Kapt

Originally, the classpath-snapshot output directory was:
  1. <project>/build/kotlin/<task>/classpath-snapshot for KotlinCompile
  2. <project>/build/tmp/kapt3/classpath-snapshot/<source-set> for
     KaptGenerateStubsTask

In commit 1d1c6d5, we started using location 1 for both tasks for
consistency.

Around that time, commit 46cb490 had a merge conflict with the above
commit, but the conflict resolution was not correct yet:
  - The property was set twice, causing a build failure.
  - Location 2 was set for KaptGenerateStubsTask again.

This commit fixes both issues, so that:
  - The property is set only once.
  - Location 1 is used for both tasks.

Test: Added Kapt3IT.testSimpleWithIC_withClasspathSnapshot to prevent
      regression

^KT-52187 Fixed

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/Kapt3IT.kt

@@ -283,10 +283,20 @@ open class Kapt3IT : Kapt3BaseIT() {
     @DisplayName("Kapt is working with incremental compilation")
     @GradleTest
     fun testSimpleWithIC(gradleVersion: GradleVersion) {
+        doTestSimpleWithIC(gradleVersion)
+    }
+
+    @DisplayName("Kapt is working with incremental compilation, when kotlin.incremental.useClasspathSnapshot=true")
+    @GradleTest
+    fun testSimpleWithIC_withClasspathSnapshot(gradleVersion: GradleVersion) {
+        doTestSimpleWithIC(gradleVersion, useClasspathSnapshot = true)
+    }
+
+    private fun doTestSimpleWithIC(gradleVersion: GradleVersion, useClasspathSnapshot: Boolean? = null) {
         project(
             "simple".withPrefix,
             gradleVersion,
-            buildOptions = defaultBuildOptions.copy(incremental = true)
+            buildOptions = defaultBuildOptions.copy(incremental = true, useGradleClasspathSnapshot = useClasspathSnapshot)
         ) {
             build("clean", "build") {
                 assertTasksExecuted(":kaptGenerateStubsKotlin", ":kaptKotlin", ":compileKotlin", ":compileJava")

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

@@ -229,8 +229,6 @@ 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(
@@ -483,7 +481,6 @@ class Kapt3GradleSubplugin @Inject internal constructor(private val registry: To
                 "${kotlinSourcesOutputDir.relativeTo(projectDir).path}/**"
             )
             it.kaptClasspath.from(kaptClasspathConfigurations)
-            it.classpathSnapshotProperties.classpathSnapshotDir.fileValue(getKaptClasspathSnapshotDir())
         }
 
         taskConfig.execute(kaptTaskProvider)