Parallelize compiler tests

compiler/build.gradle.kts

@@ -2,10 +2,6 @@ import java.io.File
 import org.gradle.api.tasks.bundling.Jar
 import org.jetbrains.kotlin.gradle.dsl.KotlinCompile
 
-tasks.withType<Test> {
-    maxParallelForks = Math.max(Runtime.getRuntime().availableProcessors() / 2, 1)
-}
-
 plugins {
     kotlin("jvm")
     id("jps-compatible")
@@ -87,7 +83,7 @@ jar.from("../idea/resources") {
     include("META-INF/extensions/compiler.xml")
 }
 
-projectTest {
+projectTest(parallel = true) {
     dependsOn(":dist")
     workingDir = rootDir
     systemProperty("kotlin.test.script.classpath", testSourceSet.output.classesDirs.joinToString(File.pathSeparator))