ConeTypeIntersector: preserve raw & dynamic types as is

compiler/fir/analysis-tests/testData/resolveWithStdlib/intersectRawAndMutable.kt

@@ -0,0 +1,29 @@
+// FILE: Producer.java
+
+import java.util.*;
+import org.jetbrains.annotations.*;
+
+public class Producer {
+    @NotNull
+    public static ArrayList foo() { return null; }
+}
+
+// FILE: test.kt
+
+interface StringSet : MutableSet<String>
+
+fun foo(arg: Boolean) {
+    val x = Producer.foo()
+    if (x is Set<*>) {
+        val y = <!DEBUG_INFO_EXPRESSION_TYPE("java.util.ArrayList<kotlin.Any..kotlin.Any?!>..java.util.ArrayList<*> & kotlin.collections.Set<*> & java.util.ArrayList<kotlin.Any..kotlin.Any?!>..java.util.ArrayList<*>")!>x<!>
+    }
+    if (x is MutableSet<*>) {
+        val y = <!DEBUG_INFO_EXPRESSION_TYPE("java.util.ArrayList<kotlin.Any..kotlin.Any?!>..java.util.ArrayList<*> & kotlin.collections.MutableSet<*> & java.util.ArrayList<kotlin.Any..kotlin.Any?!>..java.util.ArrayList<*>")!>x<!>
+    }
+    if (x is StringSet) {
+        x.add("")
+        x.add(1)
+        x.add(null)
+        x.iterator().next().length
+    }
+}