JS: prohibit external functions and accessors with bodies other than noImpl. Prohibit to use anything except noImpl for default parameters initializers in external functions. See KT-13892

compiler/testData/diagnostics/testsWithJsStdLib/native/nativeInvoke/onNativeClassMembers.kt

@@ -2,26 +2,26 @@
 
 external class A {
     @nativeInvoke
-    fun foo() {}
+    fun foo() {noImpl}
 
     @nativeInvoke
-    fun invoke(a: String): Int = 0
+    fun invoke(a: String): Int = noImpl
 
     <!WRONG_ANNOTATION_TARGET!>@nativeInvoke<!>
-    val foo = 0
+    val foo: Int = noImpl
 
     <!WRONG_ANNOTATION_TARGET!>@nativeInvoke<!>
     object Obj1 {}
 
     companion object {
         @nativeInvoke
-        fun foo() {}
+        fun foo() { noImpl }
 
         @nativeInvoke
-        fun invoke(a: String): Int = 0
+        fun invoke(a: String): Int = noImpl
 
         <!WRONG_ANNOTATION_TARGET!>@nativeInvoke<!>
-        val foo = 0
+        val foo: Int = noImpl
 
         <!WRONG_ANNOTATION_TARGET!>@nativeInvoke<!>
         object Obj2 {}

compiler/testData/diagnostics/testsWithJsStdLib/native/nativeInvoke/onNativeClassMembers.txt

@@ -2,7 +2,7 @@ package
 
 public external final class A {
     public constructor A()
-    @kotlin.js.nativeInvoke public final val foo: kotlin.Int = 0
+    @kotlin.js.nativeInvoke public final val foo: kotlin.Int
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     @kotlin.js.nativeInvoke public final fun foo(): kotlin.Unit
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
@@ -11,7 +11,7 @@ public external final class A {
 
     public companion object Companion {
         private constructor Companion()
-        @kotlin.js.nativeInvoke public final val foo: kotlin.Int = 0
+        @kotlin.js.nativeInvoke public final val foo: kotlin.Int
         public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
         @kotlin.js.nativeInvoke public final fun foo(): kotlin.Unit
         public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int

compiler/testData/diagnostics/testsWithJsStdLib/native/nativeInvoke/onNestedDeclarationsInsideNativeClass.kt

@@ -4,34 +4,26 @@ external class A {
     class B {
         class C {
             @nativeInvoke
-            fun foo() {}
+            fun foo() { noImpl }
 
             @nativeInvoke
-            fun invoke(a: String): Int = 0
+            fun invoke(a: String): Int = noImpl
         }
 
         object obj {
             @nativeInvoke
-            fun foo() {}
+            fun foo() { noImpl }
 
             @nativeInvoke
-            fun invoke(a: String): Int = 0
+            fun invoke(a: String): Int = noImpl
         }
 
         companion object {
             @nativeInvoke
-            fun foo() {}
+            fun foo() { noImpl }
 
             @nativeInvoke
-            fun invoke(a: String): Int = 0
-        }
-
-        val anonymous = object {
-            @nativeInvoke
-            fun foo() {}
-
-            @nativeInvoke
-            fun invoke(a: String): Int = 0
+            fun invoke(a: String): Int = noImpl
         }
     }
 }

compiler/testData/diagnostics/testsWithJsStdLib/native/nativeInvoke/onNestedDeclarationsInsideNativeClass.txt

@@ -8,7 +8,6 @@ public external final class A {
 
     public final class B {
         public constructor B()
-        public final val anonymous: kotlin.Any
         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