KT-53783 Prohibit "expect data object" syntax

compiler/testData/diagnostics/tests/multiplatform/expectDataObject.fir.kt

@@ -0,0 +1,8 @@
+// LANGUAGE: +DataObjects
+// MODULE: m1-common
+// FILE: common.kt
+<!INCOMPATIBLE_MODIFIERS!>expect<!> <!INCOMPATIBLE_MODIFIERS!>data<!> object DataObject
+
+// MODULE: m1-jvm()()(m1-common)
+// FILE: jvm.kt
+actual data object DataObject

compiler/testData/diagnostics/tests/multiplatform/expectDataObject.kt

@@ -0,0 +1,8 @@
+// LANGUAGE: +DataObjects
+// MODULE: m1-common
+// FILE: common.kt
+<!INCOMPATIBLE_MODIFIERS, INCOMPATIBLE_MODIFIERS{JVM}!>expect<!> <!INCOMPATIBLE_MODIFIERS, INCOMPATIBLE_MODIFIERS{JVM}!>data<!> object DataObject
+
+// MODULE: m1-jvm()()(m1-common)
+// FILE: jvm.kt
+actual data object DataObject

compiler/testData/diagnostics/tests/multiplatform/expectDataObject.txt

@@ -0,0 +1,18 @@
+// -- Module: <m1-common> --
+package
+
+public expect data object DataObject {
+    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
+}
+
+// -- Module: <m1-jvm> --
+package
+
+public actual data object DataObject {
+    private constructor DataObject()
+    public open override /*1*/ /*synthesized*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*synthesized*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*synthesized*/ fun toString(): kotlin.String
+}