[Commonizer][test] Get K/N distribution in the test instead of the build

Get distribution and home path in the test to simplify gradle build.
Using NativeCompilerDownloader in the build led to the undesired results
where test get old K/N compiler from the bootstrap, also blocking K/N
version class development.

native/commonizer-api/test/org/jetbrains/kotlin/commonizer/utils/konanHome.kt

@@ -5,10 +5,28 @@
 
 package org.jetbrains.kotlin.commonizer.utils
 
+import org.gradle.api.internal.project.ProjectInternal
+import org.gradle.testfixtures.ProjectBuilder
+import org.jetbrains.kotlin.gradle.dsl.KotlinMultiplatformExtension
+import org.jetbrains.kotlin.gradle.dsl.kotlinExtension
+import org.jetbrains.kotlin.gradle.utils.NativeCompilerDownloader
 import java.io.File
 
-internal val konanHome: File
-    get() {
-        val konanHomePath = System.getenv("KONAN_HOME")?.toString() ?: error("Missing KONAN_HOME environment variable")
-        return File(konanHomePath)
-    }
+internal val konanHome: File by lazy {
+    val project = ProjectBuilder
+        .builder()
+        .build()
+        ?.run {
+            project.plugins.apply("kotlin-multiplatform")
+
+            (project.kotlinExtension as KotlinMultiplatformExtension).apply {
+                macosX64()
+                macosArm64()
+                linuxX64()
+                mingwX64()
+            }
+            this
+        } as ProjectInternal
+    project.evaluate()
+    NativeCompilerDownloader(project).compilerDirectory
+}