[Build] Apply :idea:idea-gradle classpath modification on JPS build only

This modification is incompatible with Gradle configuration cache
Relates to #KT-44611

idea/idea-gradle/build.gradle.kts

@@ -106,6 +106,7 @@ projectTest(parallel = false) {
     workingDir = rootDir
     useAndroidSdk()
 
+    if (kotlinBuildProperties.isJpsBuildEnabled) {
         doFirst {
             val mainResourceDirPath = File(project.buildDir, "resources/main").absolutePath
             sourceSets["test"].runtimeClasspath = sourceSets["test"].runtimeClasspath.filter { file ->
@@ -118,6 +119,7 @@ projectTest(parallel = false) {
             }
         }
     }
+}
 
 configureFormInstrumentation()