[FIR] Always expand a type before checking it in FirConstChecks

The issue appeared when we analyzed some typealias.
1. The typealias itself could be valid, but it could point
to an invalid type.
2. The typealias could point, for example, to an unsigned
type that must be handled in a special way

#KT-59894

compiler/testData/diagnostics/tests/constantEvaluator/constant/typeAliasToUnsigned.kt

@@ -0,0 +1,8 @@
+// FIR_IDENTICAL
+// WITH_STDLIB
+
+typealias UI = UInt
+
+const val a: UI = 1u
+const val b: UI = a
+const val c = <!CONST_VAL_WITH_NON_CONST_INITIALIZER!>a == b<!>

compiler/testData/diagnostics/tests/constantEvaluator/constant/unresolvedReference.kt

@@ -0,0 +1,9 @@
+// FIR_IDENTICAL
+import kotlin.reflect.KClass
+
+public annotation class Throws(vararg val exceptionClasses: KClass<out Throwable>)
+
+typealias UEAlias = <!UNRESOLVED_REFERENCE!>UE<!>
+
+@Throws(<!ANNOTATION_ARGUMENT_MUST_BE_CONST!>UEAlias::class<!>)
+fun throwsTypealiasToUnresolved() {}