FIR: handle SAM constructor properly in visibility checker

#KT-46074 Fixed

compiler/fir/analysis-tests/testData/resolve/samConstructors/kotlinSam.kt

@@ -4,6 +4,12 @@ fun interface MyRunnable {
 
 fun foo(m: MyRunnable) {}
 
+private fun interface PrivateRunnable {
+    fun bar(x: String): Boolean
+}
+
+private fun bar(pr: PrivateRunnable) {}
+
 fun main() {
     foo(MyRunnable { x ->
         x > 1
@@ -14,4 +20,6 @@ fun main() {
     val x = { x: Int -> x > 1 }
 
     foo(MyRunnable(x))
+
+    bar(PrivateRunnable { s -> s.length > 0 })
 }