Refactor generator of JS source map

- refactor pipeline for generation of source map
- generate "empty" mappings for nodes that impossible
  to map to something reasonable
- generate more accurate locations in source maps for specific
  JS AST nodes
- for binary operation nodes parser now returns location
  of binary operator tokens instead of location of first operand
- change completely how source map remapper works

js/js.translator/testData/lineNumbers/enumCompanionObject.kt

@@ -6,4 +6,4 @@ enum class Foo {
     }
 }
 
-// LINES: 1 1 1 1 2 4 * 2 2 4 5 * 4 4 4 4 * 1 * 1 1 1 1
+// LINES: 1 1 1 1 2 4 * 2 2 4 5 * 4 4 4 4 * 1 * 1 1 1