[K/JS] Deprecate external enum declarations

^KT-57254 Fixed

compiler/testData/diagnostics/testsWithJsStdLib/native/enumEntry.fir.kt

@@ -1,4 +1,5 @@
-external enum class E {
+// !DIAGNOSTICS: +ENUM_CLASS_IN_EXTERNAL_DECLARATION_WARNING
+external enum class <!ENUM_CLASS_IN_EXTERNAL_DECLARATION_WARNING!>E<!> {
     X,
     <!EXTERNAL_ENUM_ENTRY_WITH_BODY!>Y {
         fun foo()

compiler/testData/diagnostics/testsWithJsStdLib/native/enumEntry.kt

@@ -1,4 +1,4 @@
-external enum class E {
+external enum class <!ENUM_CLASS_IN_EXTERNAL_DECLARATION_WARNING!>E<!> {
     X,
     Y <!EXTERNAL_ENUM_ENTRY_WITH_BODY!>{
         fun foo()

compiler/testData/diagnostics/testsWithJsStdLib/native/externalInterfaceNested.kt

@@ -1,4 +1,5 @@
 // FIR_IDENTICAL
+// !DIAGNOSTICS: +ENUM_CLASS_IN_EXTERNAL_DECLARATION_WARNING
 external interface I {
     interface J
 
@@ -6,7 +7,7 @@ external interface I {
 
     <!NESTED_CLASS_IN_EXTERNAL_INTERFACE!>object O<!>
 
-    enum class <!NESTED_CLASS_IN_EXTERNAL_INTERFACE!>E<!>
+    enum class <!ENUM_CLASS_IN_EXTERNAL_DECLARATION_WARNING, NESTED_CLASS_IN_EXTERNAL_INTERFACE!>E<!>
 
     companion <!NESTED_CLASS_IN_EXTERNAL_INTERFACE!>object<!>
 }

compiler/testData/diagnostics/testsWithJsStdLib/native/inheritance.kt

@@ -1,4 +1,5 @@
 // FIR_IDENTICAL
+// !DIAGNOSTICS: +ENUM_CLASS_IN_EXTERNAL_DECLARATION_WARNING
 open class A
 
 interface I
@@ -11,10 +12,10 @@ external class <!EXTERNAL_TYPE_EXTENDS_NON_EXTERNAL_TYPE!>D<!> : B, I
 
 external interface <!EXTERNAL_TYPE_EXTENDS_NON_EXTERNAL_TYPE!>K<!> : I
 
-external enum class E {
+external enum class <!ENUM_CLASS_IN_EXTERNAL_DECLARATION_WARNING!>E<!> {
     X
 }
 
-external enum class <!EXTERNAL_TYPE_EXTENDS_NON_EXTERNAL_TYPE!>F<!> : I {
+external enum class <!ENUM_CLASS_IN_EXTERNAL_DECLARATION_WARNING, EXTERNAL_TYPE_EXTENDS_NON_EXTERNAL_TYPE!>F<!> : I {
     X
 }

compiler/testData/diagnostics/testsWithJsStdLib/native/inlineClass.kt

@@ -1,10 +1,11 @@
 // FIR_IDENTICAL
 // !LANGUAGE: +InlineClasses, -JvmInlineValueClasses
+// !DIAGNOSTICS: +ENUM_CLASS_IN_EXTERNAL_DECLARATION_WARNING
 
 external inline class <!WRONG_EXTERNAL_DECLARATION!>C(<!EXTERNAL_CLASS_CONSTRUCTOR_PROPERTY_PARAMETER!>val a: Int<!>)<!> {
     fun foo()
 }
 
-<!WRONG_MODIFIER_TARGET!>inline<!> external enum class <!WRONG_EXTERNAL_DECLARATION!>E<!> {
+<!WRONG_MODIFIER_TARGET!>inline<!> external enum class <!ENUM_CLASS_IN_EXTERNAL_DECLARATION_WARNING, WRONG_EXTERNAL_DECLARATION!>E<!> {
     A
 }

compiler/testData/diagnostics/testsWithJsStdLib/native/innerClass.kt

@@ -1,9 +1,10 @@
 // FIR_IDENTICAL
+// !DIAGNOSTICS: +ENUM_CLASS_IN_EXTERNAL_DECLARATION_WARNING
 external class C {
     inner class <!WRONG_EXTERNAL_DECLARATION!>Inner<!>
 }
 
-external enum class E {
+external enum class <!ENUM_CLASS_IN_EXTERNAL_DECLARATION_WARNING!>E<!> {
     X;
 
     inner class <!WRONG_EXTERNAL_DECLARATION!>Inner<!>

compiler/testData/diagnostics/testsWithJsStdLib/native/wrongTarget.kt

@@ -1,4 +1,5 @@
 // FIR_IDENTICAL
+// !DIAGNOSTICS: +ENUM_CLASS_IN_EXTERNAL_DECLARATION_WARNING
 external annotation class <!WRONG_EXTERNAL_DECLARATION!>A(val x: Int)<!>
 
 val x: Int
@@ -19,4 +20,8 @@ external class D {
         <!WRONG_EXTERNAL_DECLARATION!>external get()<!> = definedExternally
 }
 
-external data class <!WRONG_EXTERNAL_DECLARATION!>E(val x: Int)<!>
+external data class <!WRONG_EXTERNAL_DECLARATION!>E(val x: Int)<!>
+
+external enum class <!ENUM_CLASS_IN_EXTERNAL_DECLARATION_WARNING!>F<!> {
+    A, B, C
+}

compiler/testData/diagnostics/testsWithJsStdLib/native/wrongTarget.txt

@@ -43,3 +43,26 @@ public final external data class E {
     public open override /*1*/ /*synthesized*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*synthesized*/ fun toString(): kotlin.String
 }
+
+public final external enum class F : kotlin.Enum<F> {
+    enum entry A
+
+    enum entry B
+
+    enum entry C
+
+    private constructor F()
+    @kotlin.internal.IntrinsicConstEvaluation public final override /*1*/ /*fake_override*/ val name: kotlin.String
+    public final override /*1*/ /*fake_override*/ val ordinal: kotlin.Int
+    protected final override /*1*/ /*fake_override*/ fun clone(): kotlin.Any
+    public final override /*1*/ /*fake_override*/ fun compareTo(/*0*/ other: F): kotlin.Int
+    public final override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    // Static members
+    public final /*synthesized*/ val entries: kotlin.enums.EnumEntries<F>
+    public final /*synthesized*/ fun valueOf(/*0*/ value: kotlin.String): F
+    public final /*synthesized*/ fun values(): kotlin.Array<F>
+}
+