[LL FIR] do not reanalyze non-top level properties with initializer

Treat changes inside non-top level property initializer as OOB
It is OOB because CFG for a class depends on a property initializer,
so we must rebuild CFG for the class

Also, this commit makes the API more understandable

^KT-59687

analysis/low-level-api-fir/testdata/fileStructure/superClassCall.kt

@@ -1,7 +1,7 @@
 open class A
     (init: A.() -> Unit)/* NonReanalyzableNonClassDeclarationStructureElement */
 {/* NonReanalyzableClassDeclarationStructureElement */
-    val prop: String = ""/* ReanalyzablePropertyStructureElement */
+    val prop: String = ""/* NonReanalyzableNonClassDeclarationStructureElement */
 }
 
 class B()/* NonReanalyzableNonClassDeclarationStructureElement */ : A()/* NonReanalyzableClassDeclarationStructureElement */