KT-2752: refactor generation of FQN in JS. Move backend-independent code to generic code in frontend.

js/js.translator/testData/box/inlineStdlib/callableRefToFunInCurrentModule.kt

@@ -1,7 +1,7 @@
 package foo
 
-// CHECK_NOT_CALLED_IN_SCOPE: scope=test function=even
-// CHECK_NOT_CALLED_IN_SCOPE: scope=test function=filter_azvtw4$
+// CHECK_NOT_CALLED_IN_SCOPE: scope=test_0 function=even_0
+// CHECK_NOT_CALLED_IN_SCOPE: scope=test_0 function=filter_azvtw4$
 
 internal fun even(x: Int) = x % 2 == 0
 

js/js.translator/testData/box/inlineStdlib/closure.kt

@@ -1,6 +1,6 @@
 package foo
 
-// CHECK_CONTAINS_NO_CALLS: test
+// CHECK_CONTAINS_NO_CALLS: test_0
 
 internal fun test(a: Int, b: Int): Int {
     var c = 0

js/js.translator/testData/box/inlineStdlib/closureNested.kt

@@ -1,6 +1,6 @@
 package foo
 
-// CHECK_CONTAINS_NO_CALLS: test
+// CHECK_CONTAINS_NO_CALLS: test_0
 
 internal fun test(a: Int, b: Int): Int {
     var res = 0

js/js.translator/testData/box/inlineStdlib/localNamesClash.kt

@@ -1,6 +1,6 @@
 package foo
 
-// CHECK_CONTAINS_NO_CALLS: test
+// CHECK_CONTAINS_NO_CALLS: test_0
 
 internal fun test(x: Int, y: Int): Int =
         with (x + x) {

js/js.translator/testData/box/inlineStdlib/simple.kt

@@ -1,6 +1,6 @@
 package foo
 
-// CHECK_CONTAINS_NO_CALLS: test
+// CHECK_CONTAINS_NO_CALLS: test_0
 
 internal var counter = 0
 

js/js.translator/testData/box/inlineStdlib/thisInExtension.kt

@@ -1,7 +1,7 @@
 package foo
 
-// CHECK_CONTAINS_NO_CALLS: testImplicitThis
-// CHECK_CONTAINS_NO_CALLS: testExplicitThis
+// CHECK_CONTAINS_NO_CALLS: testImplicitThis_0
+// CHECK_CONTAINS_NO_CALLS: testExplicitThis_0
 
 internal class A(var value: Int)