[K/JS] Exclude default from the regular reserved keywords to give ability to export declarations with default export ^KT-54480 Fixed

fix(KT-54480): exclude default from the regular reserved keywords to give ability to export intities with default export.

Merge-request: KT-MR-7459
Merged-by: Artem Kobzar <Artem.Kobzar@jetbrains.com>

compiler/testData/diagnostics/testsWithJsStdLib/export/nonConsumableIdentifiers.kt

@@ -24,6 +24,10 @@ val bar = 4
 @JsName(<!NON_CONSUMABLE_EXPORTED_IDENTIFIER!>"super"<!>)
 class Baz
 
+@JsExport
+@JsName("default")
+class DefDef
+
 @JsExport
 class Test {
     fun instanceof() {}

compiler/testData/diagnostics/testsWithJsStdLib/export/nonConsumableIdentifiers.txt

@@ -13,6 +13,13 @@ package foo {
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
     }
 
+    @kotlin.js.JsExport @kotlin.js.JsName(name = "default") public final class DefDef {
+        public constructor DefDef()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
     @kotlin.js.JsExport public object NaN {
         private constructor NaN()
         public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean