JVM IR: replace function accesses in multi-file parts

Any access to a function from a multi-file part needs to be replaced
with the access to the corresponding public method (if it exists) from
the facade class. Note that this has no immediate effect because we use
KotlinTypeMapper for mapping calls, and it understands that a call to a
function from the part must actually be generated into a call to the
function from the facade in the bytecode. This commit merely changes the
IR to better reflect what's generated in the final bytecode, and to be
able to use simplified IR-based method signature mapping instead of the
legacy KotlinTypeMapper in the future.

compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxInlineCodegenTestGenerated.java

@@ -1924,6 +1924,11 @@ public class BlackBoxInlineCodegenTestGenerated extends AbstractBlackBoxInlineCo
             KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/boxInline/multifileClasses"), Pattern.compile("^(.+)\\.kt$"), TargetBackend.JVM, true);
         }
 
+        @TestMetadata("defaultArguments.kt")
+        public void testDefaultArguments() throws Exception {
+            runTest("compiler/testData/codegen/boxInline/multifileClasses/defaultArguments.kt");
+        }
+
         @TestMetadata("inlineFromOptimizedMultifileClass.kt")
         public void testInlineFromOptimizedMultifileClass() throws Exception {
             runTest("compiler/testData/codegen/boxInline/multifileClasses/inlineFromOptimizedMultifileClass.kt");