JVM: produce a better error on @JvmStatic external in interface

Java does not permit `static native` methods in interfaces, so this
never worked on any existing JRE.

 #KT-43696 Fixed

compiler/testData/diagnostics/testsWithStdLib/annotations/jvmStatic/interfaceCompanion_LL12.txt

@@ -9,6 +9,8 @@ public interface B {
         private constructor Companion()
         @kotlin.jvm.JvmStatic public final var foo: kotlin.Int
         @kotlin.jvm.JvmStatic public final var foo1: kotlin.Int
+        @kotlin.jvm.JvmStatic public final val foo10: kotlin.Int
+        @get:kotlin.jvm.JvmStatic public final val foo11: kotlin.Int
         @kotlin.jvm.JvmStatic public final var foo2: kotlin.Int
         @kotlin.jvm.JvmStatic private final var foo3: kotlin.Int
         @kotlin.jvm.JvmStatic protected final var foo4: kotlin.Int
@@ -21,6 +23,7 @@ public interface B {
         @kotlin.jvm.JvmStatic private final fun a2(): kotlin.Unit
         @kotlin.jvm.JvmStatic protected final fun a3(): kotlin.Unit
         @kotlin.jvm.JvmStatic internal final fun a4(): kotlin.Unit
+        @kotlin.jvm.JvmStatic public final external fun a5(): kotlin.Unit
         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