[JS BE] mutes tests for JS_IR_ES6, which muted for JS_IR

js/js.translator/testData/box/native/callbackOptionalParameter.kt

@@ -1,4 +1,5 @@
 // IGNORE_BACKEND: JS_IR
+// IGNORE_BACKEND: JS_IR_ES6
 // EXPECTED_REACHABLE_NODES: 1294
 package foo
 

js/js.translator/testData/box/native/library.kt

@@ -1,4 +1,5 @@
 // DONT_TARGET_EXACT_BACKEND: JS_IR
+// DONT_TARGET_EXACT_BACKEND: JS_IR_ES6
 // EXPECTED_REACHABLE_NODES: 1282
 @file:Suppress("INVISIBLE_REFERENCE", "INVISIBLE_MEMBER")
 package foo

js/js.translator/testData/box/native/nativeGetterAndNativeSetter.kt

@@ -1,4 +1,5 @@
 // IGNORE_BACKEND: JS_IR
+// IGNORE_BACKEND: JS_IR_ES6
 // EXPECTED_REACHABLE_NODES: 1291
 package foo
 

js/js.translator/testData/box/native/nativeInvoke.kt

@@ -1,4 +1,5 @@
 // IGNORE_BACKEND: JS_IR
+// IGNORE_BACKEND: JS_IR_ES6
 // EXPECTED_REACHABLE_NODES: 1286
 package foo
 

js/js.translator/testData/box/native/passExtLambdaFromNative.kt

@@ -1,4 +1,5 @@
 // IGNORE_BACKEND: JS_IR
+// IGNORE_BACKEND: JS_IR_ES6
 // EXPECTED_REACHABLE_NODES: 1285
 package foo
 

js/js.translator/testData/box/native/passExtLambdaToNative.kt

@@ -1,4 +1,5 @@
 // IGNORE_BACKEND: JS_IR
+// IGNORE_BACKEND: JS_IR_ES6
 // TODO: Unmute when extension functions are supported in external declarations.
 // IGNORE_BACKEND: JS
 

js/js.translator/testData/box/native/passMemberOrExtToNative.kt

@@ -1,4 +1,5 @@
 // IGNORE_BACKEND: JS_IR
+// IGNORE_BACKEND: JS_IR_ES6
 // TODO: Unmute when extension functions are supported in external declarations.
 // IGNORE_BACKEND: JS
 

js/js.translator/testData/box/native/print.kt

@@ -1,4 +1,5 @@
 // IGNORE_BACKEND: JS_IR
+// IGNORE_BACKEND: JS_IR_ES6
 // KJS_WITH_FULL_RUNTIME
 // SKIP_MINIFICATION
 // This test uses eval