JVM_IR fix cast to non-null primitive type (FIR bootstrap issue)

compiler/testData/codegen/box/ieee754/anyCastToPrimitiveCompareTo1.kt

@@ -0,0 +1,9 @@
+class C(val value: Any)
+
+fun box(): String {
+    val c1 = C(-0.0)
+    val c2 = C(0.toByte())
+    val cmp = (c1.value as Double).compareTo(c2.value as Byte)
+    if (cmp != -1) return "Failed: cmp=$cmp"
+    return "OK"
+}

compiler/testData/codegen/box/ieee754/anyCastToPrimitiveCompareTo2.kt

@@ -0,0 +1,9 @@
+class C(val value: Any)
+
+fun box(): String {
+    val c1 = C(1.1)
+    val c2 = C(1)
+    val cmp = (c1.value as Double).compareTo(c2.value as Int)
+    if (cmp != 1) return "Failed: cmp=$cmp"
+    return "OK"
+}