[FIR] Handle ConeIntersectionType in createSimpleType

^KT-62819 Fixed

compiler/testData/diagnostics/tests/inference/intersectionTypeOnWhenCall.kt

@@ -0,0 +1,16 @@
+// FIR_IDENTICAL
+// ISSUE: KT-62819
+
+class A<T>
+
+fun foo(cond: Boolean) {
+    val first = when (cond) {
+        true -> A<Int>()
+        false -> A<String?>()
+    }
+
+    val second = when (cond) {
+        true -> first
+        false -> first
+    }
+}