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.inliner/src/org/jetbrains/kotlin/js/inline/FunctionReader.kt

@@ -194,7 +194,7 @@ class FunctionReader(
 
         val sourceMap = info.sourceMap
         if (sourceMap != null) {
-            val remapper = SourceMapLocationRemapper(mapOf(info.filePath to sourceMap))
+            val remapper = SourceMapLocationRemapper(sourceMap)
             remapper.remap(function)
         }