Fix KType.javaType for suspend function return type

#KT-26293 Fixed

compiler/testData/codegen/box/reflection/mapping/types/suspendFun.kt

@@ -0,0 +1,16 @@
+// IGNORE_BACKEND: JS, NATIVE, JS_IR, JVM_IR
+// WITH_REFLECT
+
+import kotlin.reflect.jvm.javaType
+import kotlin.test.assertEquals
+
+interface A {
+    suspend fun f(param: String): MutableList<in String>
+}
+
+fun box(): String {
+    val type = A::class.members.single { it.name == "f" }.returnType.javaType
+    assertEquals("java.util.List<? super java.lang.String>", type.toString())
+
+    return "OK"
+}