Deprecate mapIndexedTo for Maps.

libraries/stdlib/src/generated/_Maps.kt

@@ -52,6 +52,7 @@ public inline fun <K, V, R> Map<K, V>.map(transform: (Map.Entry<K, V>) -> R): Li
  * Applies the given [transform] function to each entry and its index in the original map
  * and appends the results to the given [destination].
  */
+@Deprecated("Use entries.mapIndexedTo instead.", ReplaceWith("this.entries.mapIndexedTo(destination, transform)"))
 public inline fun <K, V, R, C : MutableCollection<in R>> Map<K, V>.mapIndexedTo(destination: C, transform: (Int, Map.Entry<K, V>) -> R): C {
     var index = 0
     for (item in this)

libraries/tools/kotlin-stdlib-gen/src/templates/Mapping.kt

@@ -178,6 +178,7 @@ fun mapping(): List<GenericFunction> {
             """
         }
         deprecate(Strings) { forBinaryCompatibility }
+        deprecate(Maps) { Deprecation("Use entries.mapIndexedTo instead.", replaceWith = "this.entries.mapIndexedTo(destination, transform)") }
         include(Maps, CharSequences, Strings)
     }