[JS IR] Wrap private top level function with internal accessor stub

In case internal inline function references private top level function
after inline such function (T.L.P.) couldn't be referenced
in klib and IC cache. So create internally visible accessors for P.T.L.
function similar to what JVM backend does.

 - add box test

compiler/tests-gen/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java

@@ -18865,6 +18865,11 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
             public void testEnumEntryArguments() throws Exception {
                 runTest("compiler/testData/codegen/box/ir/privateSignatures/enumEntryArguments.kt");
             }
+
+            @TestMetadata("privateLeakThroughInline.kt")
+            public void testPrivateLeakThroughInline() throws Exception {
+                runTest("compiler/testData/codegen/box/ir/privateSignatures/privateLeakThroughInline.kt");
+            }
         }
 
         @TestMetadata("compiler/testData/codegen/box/ir/serializationRegressions")