JS: extension lambdas translated same as local lambdas (KT-13312 fixed)

compiler/testData/codegen/box/extensionFunctions/kt13312.kt

@@ -0,0 +1,23 @@
+fun test1(f: (Int) -> Int) = f(1)
+
+fun test2(f: Int.() -> Int) = 2.f()
+
+class A(val foo: Int.() -> Int)
+
+fun box(): String {
+    val a: (Int) -> Int = { it }
+    val b: Int.() -> Int = { this }
+
+    if (test1(a) != 1) return "fail 1a"
+    if (test1(b) != 1) return "fail 1b"
+    if (test2(a) != 2) return "fail 2a"
+    if (test2(b) != 2) return "fail 2b"
+
+    val x = A({ this })
+
+    if (x.foo(3) != 3) return "fail 3"
+    if (with(x) { foo(4) } != 4) return "fail 4"
+    if (with(x) { 5.foo() } != 5) return "fail 5"
+
+    return "OK"
+}

compiler/testData/codegen/box/extensionFunctions/kt3646.kt

@@ -1,6 +1,3 @@
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS
-
 fun test(cl: Int.() -> Int):Int = 11.cl()
 
 class Foo {

compiler/testData/codegen/box/functions/invoke/castFunctionToExtension.kt

@@ -1,6 +1,3 @@
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS
-
 fun box(): String {
     val f = fun (s: String): String = s
     val g = f as String.() -> String

compiler/testData/codegen/box/functions/localFunctions/kt4989.kt

@@ -1,6 +1,3 @@
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS
-
 class It(val id: String)
 
 fun box(): String {

compiler/testData/codegen/box/operatorConventions/kt4987.kt

@@ -1,6 +1,3 @@
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS
-
 fun box(): String {
     operator fun Int?.inc() = (this ?: 0) + 1
     var counter: Int? = null

compiler/testData/codegen/box/reflection/functions/functionFromStdlib.kt

@@ -1,6 +1,3 @@
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS
-
 // WITH_REFLECT
 
 fun doStuff(fn: String.() -> String) = "ok".fn()