JVM_IR KT-47326 downcast field receiver on JvmField lowering

compiler/testData/codegen/bytecodeListing/kt47328.kt

@@ -0,0 +1,9 @@
+// WITH_RUNTIME
+
+interface A { val x: Int }
+
+class B(@JvmField override val x: Int): A
+
+class C<D: A>(@JvmField val d: D)
+
+class E(c: C<B>) { val ax = c.d.x }