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

compiler/testData/codegen/box/inlineClasses/boxReturnValueOnOverride/overrideGenericWithNullableInlineClassUpperBoundWithNonNullNullableAnyNull.kt

@@ -1,4 +1,5 @@
 // IGNORE_BACKEND: JS_IR
+// IGNORE_BACKEND: JS_IR_ES6
 
 inline class X(val x: Any?)
 

compiler/testData/codegen/box/inlineClasses/fieldNameClash.kt

@@ -1,5 +1,6 @@
 // IGNORE_BACKEND_FIR: JVM_IR
 // IGNORE_BACKEND: JVM, JVM_IR, JS, JS_IR, NATIVE
+// IGNORE_BACKEND: JS_IR_ES6
 // There is a bug in the type mapper which results in an incorrect asm type for Z
 // when the names of the inline class backing field and an extension property clash.
 // https://youtrack.jetbrains.com/issue/KT-31927

compiler/testData/codegen/box/inlineClasses/functionNameMangling/mangledFunctionsPresentInStackTrace.kt

@@ -1,5 +1,6 @@
 // !LANGUAGE: +InlineClasses
 // IGNORE_BACKEND: JS, JS_IR
+// IGNORE_BACKEND: JS_IR_ES6
 // FULL_JDK
 // WITH_RUNTIME
 

compiler/testData/codegen/box/inlineClasses/kt27113.kt

@@ -1,5 +1,6 @@
 // !LANGUAGE: +InlineClasses
 // IGNORE_BACKEND: JS, JS_IR, NATIVE
+// IGNORE_BACKEND: JS_IR_ES6
 // WITH_RUNTIME
 
 class CharacterLiteral(private val prefix: NamelessString, private val s: NamelessString) {

compiler/testData/codegen/box/inlineClasses/simpleSecondaryConstructor.kt

@@ -1,4 +1,5 @@
 // IGNORE_BACKEND: JS, JS_IR, NATIVE, JVM
+// IGNORE_BACKEND: JS_IR_ES6
 // !LANGUAGE: +InlineClasses
 
 @file:Suppress("SECONDARY_CONSTRUCTOR_WITH_BODY_INSIDE_INLINE_CLASS")

compiler/testData/codegen/box/inlineClasses/unboxParameterOfSuspendLambdaBeforeInvoke.kt

@@ -1,6 +1,7 @@
 // WITH_COROUTINES
 // WITH_RUNTIME
 // IGNORE_BACKEND: JS_IR
+// IGNORE_BACKEND: JS_IR_ES6
 
 import helpers.*
 import kotlin.coroutines.*