FIR: approximate intersections in public position properly

#KT-48166 Fixed

compiler/fir/analysis-tests/testData/resolveWithStdlib/intellij/ParentOfType.fir.txt

@@ -0,0 +1,6 @@
+FILE: ParentOfType.kt
+    public final fun <T : R|kotlin/Number|> R|kotlin/Any|.parentOfTypes(vararg classes: R|kotlin/Array<out kotlin/reflect/KClass<out T>>|): R|T?| {
+        throw R|java/lang/IllegalStateException.IllegalStateException|()
+    }
+    public final val some: R|kotlin/Number?| = String(123).R|/parentOfTypes|<R|it(kotlin/Number & kotlin/Comparable<*>)|>(vararg(<getClass>(Q|kotlin/Int|), <getClass>(Q|kotlin/Double|)))
+        public get(): R|kotlin/Number?|

compiler/fir/analysis-tests/testData/resolveWithStdlib/intellij/ParentOfType.kt

@@ -0,0 +1,7 @@
+import kotlin.reflect.KClass
+
+fun <T : Number> Any.parentOfTypes(vararg classes: KClass<out T>): T? {
+    throw IllegalStateException()
+}
+
+val some = "123".parentOfTypes(Int::class, Double::class)