Don't report error on member that overrides open member from final class

#KT-14598 Fixed

compiler/testData/diagnostics/tests/override/overrideMemberFromFinalClass.kt

@@ -0,0 +1,28 @@
+class Foo {
+    <!NON_FINAL_MEMBER_IN_FINAL_CLASS!>open<!> fun openFoo() {}
+    fun finalFoo() {}
+}
+
+class Bar : <!FINAL_SUPERTYPE!>Foo<!>() {
+    override fun openFoo() {}
+    <!OVERRIDING_FINAL_MEMBER!>override<!> fun finalFoo() {}
+}
+
+
+open class A1 {
+    open fun foo() {}
+}
+
+class B1 : A1()
+class C1 : <!FINAL_SUPERTYPE!>B1<!>() {
+    override fun foo() {}
+}
+
+abstract class A2 {
+    abstract fun foo()
+}
+
+<!ABSTRACT_CLASS_MEMBER_NOT_IMPLEMENTED!>class B2<!> : A2()
+class C2 : <!FINAL_SUPERTYPE!>B2<!>() {
+    override fun foo() {}
+}

compiler/testData/diagnostics/tests/override/overrideMemberFromFinalClass.txt

@@ -0,0 +1,67 @@
+package
+
+public open class A1 {
+    public constructor A1()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open fun foo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public abstract class A2 {
+    public constructor A2()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public abstract fun foo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class B1 : A1 {
+    public constructor B1()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun foo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class B2 : A2 {
+    public constructor B2()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public abstract override /*1*/ /*fake_override*/ fun foo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class Bar : Foo {
+    public constructor Bar()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ fun finalFoo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ fun openFoo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class C1 : B1 {
+    public constructor C1()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ fun foo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class C2 : B2 {
+    public constructor C2()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ fun foo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class Foo {
+    public constructor Foo()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final fun finalFoo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open fun openFoo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}