[FE] Stop ignoring ABSTRACT_MEMBER_NOT_IMPLEMENTED for expect classes

^KT-59739 Fixed
Review: https://jetbrains.team/p/kt/reviews/11038/timeline

compiler/testData/diagnostics/tests/modifiers/openInExpectInterface.fir.kt

@@ -19,9 +19,9 @@ expect interface My {
     val f: Int
 }
 
-class MyImpl1: My
+<!ABSTRACT_MEMBER_NOT_IMPLEMENTED!>class MyImpl1<!>: My
 
-class MyImpl2: My {
+<!ABSTRACT_MEMBER_NOT_IMPLEMENTED!>class MyImpl2<!>: My {
     override fun foo() {}
     override val f = 0
     override val e = 1