[FIR] Handle of special getters when there is a kotlin super type

Special getter names (like Collection.size()) can be used only in Java
classes with all-java super-types
Because if there is a kotlin class (not interface) in
 the middle, we 'materialize' special getters to properties.

compiler/testData/codegen/box/collections/implementCollectionThroughKotlin.kt

@@ -1,5 +1,4 @@
 // TARGET_BACKEND: JVM
-// IGNORE_BACKEND_FIR: JVM_IR
 
 // FILE: J.java