KT-2752: fix old tests, add test for clashing between class and its companion object

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

@@ -14,7 +14,7 @@ class A {
     fun Int.invoke(a: String, b: Int)<!> = "OK"
 
     <!WRONG_ANNOTATION_TARGET!>@nativeInvoke<!>
-    val foo = 0
+    val baz = 0
 
     <!WRONG_ANNOTATION_TARGET!>@nativeInvoke<!>
     object Obj {}

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

@@ -2,7 +2,7 @@ package
 
 public final class A {
     public constructor A()
-    @kotlin.js.nativeInvoke() public final val foo: kotlin.Int = 0
+    @kotlin.js.nativeInvoke() public final val baz: kotlin.Int = 0
     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