Do not allow to assign null to a non-null property via reflection

This was already working for accessor-based properties because the assertions
were already generated into corresponding accessors, but for fields we must
manually check the value against null

compiler/testData/codegen/boxWithStdlib/reflection/call/disallowNullValueForNotNullField.kt

@@ -0,0 +1,43 @@
+import kotlin.reflect.*
+import kotlin.reflect.jvm.*
+import kotlin.platform.platformStatic as static
+
+class A {
+    private var foo: String = ""
+}
+
+object O {
+    private static var bar: String = ""
+}
+
+class CounterTest<T>(t: T) {
+    private var baz: String? = ""
+    private var generic: T = t
+}
+
+fun box(): String {
+    val p = A::class.memberProperties.single() as KMutableProperty1<A, String?>
+    p.isAccessible = true
+    try {
+        p.setter.call(A(), null)
+        return "Fail: exception should have been thrown"
+    } catch (e: IllegalArgumentException) {}
+
+
+    val o = O::class.memberProperties.single() as KMutableProperty1<O, String?>
+    o.isAccessible = true
+    try {
+        o.setter.call(O, null)
+        return "Fail: exception should have been thrown"
+    } catch (e: IllegalArgumentException) {}
+
+
+    val c = CounterTest::class.memberProperties.single { it.name == "baz" } as KMutableProperty1<CounterTest<*>, String?>
+    c.isAccessible = true
+    c.setter.call(CounterTest(""), null) // Should not fail, because CounterTest::baz is nullable
+    val d = CounterTest::class.memberProperties.single { it.name == "generic" } as KMutableProperty1<CounterTest<*>, String?>
+    d.isAccessible = true
+    d.setter.call(CounterTest(""), null) // Also should not fail, because we can't be sure about nullability of 'generic'
+
+    return "OK"
+}