FE: add new tests around unresolved integer literals

Related to KT-57487, KT-57703

compiler/testData/codegen/box/fir/vararg.kt

@@ -0,0 +1,23 @@
+// TARGET_BACKEND: JVM_IR
+// IGNORE_BACKEND_K1: JVM_IR
+// (type mismatch)
+// IGNORE_BACKEND_K2: JVM_IR
+// (CCE in select)
+// WITH_STDLIB
+
+fun <A : Comparable<A>> arrayData(vararg values: A): A = values.first()
+
+fun test(b: Byte) = select(arrayData(1), b)
+
+fun <S : Comparable<S>> select(a: S, b: S): S {
+    if (a.compareTo(b) > 0) return a else return b
+}
+
+fun box(): String {
+    val res = test(-42)
+    val res2 = res.dec()
+    res.doSomething()
+    if (res == 1.toByte() && res2 == 0.toByte()) return "OK" else return res.toString()
+}
+
+fun Byte.doSomething() {}