[Test] Add service to provide additional classpath to box tests

compiler/test-infrastructure/tests/org/jetbrains/kotlin/test/services/RuntimeClasspathProvider.kt

@@ -0,0 +1,18 @@
+/*
+ * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.test.services
+
+import java.io.File
+
+abstract class RuntimeClasspathProvider {
+    abstract fun runtimeClassPaths(): List<File>
+}
+
+class RuntimeClasspathProviderHolder(val providers: List<RuntimeClasspathProvider>) : TestService
+
+private val TestServices.runtimeClasspathProviderHolder: RuntimeClasspathProviderHolder by TestServices.testServiceAccessor()
+val TestServices.runtimeClasspathProviders: List<RuntimeClasspathProvider>
+    get() = runtimeClasspathProviderHolder.providers