Support test with self imports, kotlin multifile tests

compiler/testData/codegen/boxInline/innerClasses/innerLambda.kt

@@ -28,5 +28,5 @@ fun box(): String {
 
     foo2()().run()
 
-    return test.sideEffects
+    return sideEffects
 }

compiler/testData/codegen/boxInline/multifileClasses/inlineFromOptimizedMultifileClass.kt

@@ -17,6 +17,6 @@ import a.foo
 import a.inlineOnly
 
 fun box(): String {
-    if (!a.inlineOnly<String>("OK")) return "fail 1"
+    if (!inlineOnly<String>("OK")) return "fail 1"
    return foo { "OK" }
 }

compiler/testData/codegen/boxInline/multifileClasses/inlineFromOtherPackage.kt

@@ -15,6 +15,6 @@ import a.foo
 import a.inlineOnly
 
 fun box(): String {
-    if (!a.inlineOnly<String>("OK")) return "fail 1"
+    if (!inlineOnly<String>("OK")) return "fail 1"
    return foo { "OK" }
 }