Unit Test Tooling: Support Go to Test/Create Test actions for top-level declarations

#KT-10133 Fixed

idea/testData/navigation/gotoTestOrCode/fromJavaTestToKotlinFile.main.java

@@ -0,0 +1,9 @@
+// CONFIGURE_LIBRARY: JUnit@lib/junit-4.12.jar
+// REF: (<root>).Foo
+// REF: /src.fromJavaTestToKotlinFile.kt
+// REF: /src.fromJavaTestToKotlinFile.2.kt
+import junit.framework.TestCase;
+
+public class <caret>FooUtilsTest extends TestCase {
+
+}