KNPE fixed in data class checker together with some ID warnings #KT-9296 Fixed #EA-73584 Fixed

compiler/testData/diagnostics/tests/dataClasses/dataClassNoName.kt

@@ -0,0 +1,9 @@
+// See EA-73584
+data class<!SYNTAX!><!> {
+
+}
+
+// See KT-9296
+<!WRONG_MODIFIER_TARGET!>data<!> interface<!SYNTAX!><!> {
+
+}

compiler/testData/diagnostics/tests/dataClasses/dataClassNoName.txt

@@ -0,0 +1,15 @@
+package
+
+@kotlin.data() public final class <no name provided> {
+    public constructor <no name provided>()
+    public final /*synthesized*/ fun copy(): <no name provided>
+    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
+}
+
+@kotlin.data() public interface <no name provided> {
+    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
+}