[FIR] Check for setter visibility in resolution stage

This is required for the following commit where candidates from the
original scope in presence of smart cast will not be ignored if they're
the same symbol.

compiler/testData/diagnostics/tests/privateInFile/visibility.fir.kt

@@ -35,7 +35,7 @@ fun test() {
     val u : <!INVISIBLE_REFERENCE!>A<!> = <!INVISIBLE_REFERENCE!>A<!>()
 
     val z = <!INVISIBLE_REFERENCE!>x<!>
-    <!INVISIBLE_REFERENCE, INVISIBLE_SETTER!>x<!> = 30
+    <!INVISIBLE_REFERENCE!>x<!> = 30
 
     val po = <!INVISIBLE_REFERENCE!>PO<!>