Don't share temp directory between tests.

Apparently this causes problems on Windows CI runners.

^KT-45744 In Progress

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

@@ -29,11 +29,8 @@ import kotlin.streams.asStream
 abstract class KGPBaseTest {
     open val defaultBuildOptions = BuildOptions()
 
-    companion object {
-        @TempDir
-        @JvmStatic
-        lateinit var workingDir: Path
-    }
+    @TempDir
+    lateinit var workingDir: Path
 
     data class BuildOptions(
         val logLevel: LogLevel = LogLevel.INFO,

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

@@ -30,7 +30,7 @@ fun KGPBaseTest.project(
     val projectPath = setupProjectFromTestResources(
         projectName,
         gradleVersion,
-        KGPBaseTest.workingDir
+        workingDir
     )
     projectPath.addDefaultBuildFiles()
 
@@ -96,6 +96,7 @@ private fun TestProject.commonBuildSetup(
     println("<=== Test build: ${this.projectName} ===>")
     println("<=== Using Gradle version: ${gradleVersion.version} ===>")
     println("<=== Run arguments: ${allBuildArguments.joinToString()} ===>")
+    println("<=== Project path:  ${projectPath.toAbsolutePath()} ===>")
 
     return allBuildArguments
 }