KT-9688 Completion of methods to override: prefer those that need to be implemented

#KT-9688 Fixed

idea/idea-completion/testData/basic/common/override/PreferImplementToOverride.kt

@@ -0,0 +1,16 @@
+interface I {
+    fun bbb()
+}
+
+open class Base {
+    open fun aaa()
+}
+
+class A : Base(), I {
+    overr<caret>
+}
+
+// WITH_ORDER
+// EXIST: { itemText: "override" }
+// EXIST: { itemText: "override fun bbb() {...}" }
+// EXIST: { itemText: "override fun aaa() {...}" }