[K2] Fix EXPECTED_DECLARATION_WITH_BODY not reporting on property accessors

We don't want any `expect` function to have body. So we're sure no
new false-positive reports are introduced because of removal of
`isTopLevelOrInsideClass` condition.

^KT-59899 Fixed

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

@@ -13,7 +13,7 @@ expect interface My {
 
     open val a: Int
     open val b: String
-    open val c: String get() = ""
+    open val c: String <!EXPECTED_DECLARATION_WITH_BODY!>get()<!> = ""
     <!REDUNDANT_MODIFIER!>open<!> abstract val e: Int
 
     val f: Int