FIR: Properly deserialize upper bounds of classes type parameters

^KT-46661 Fixed

compiler/testData/diagnostics/tests/classLiteral/smartCast.fir.kt

@@ -1,23 +0,0 @@
-// KT-16291 Smart cast doesn't work when getting class of instance
-
-import kotlin.reflect.KClass
-
-class Foo {
-    override fun equals(other: Any?): Boolean {
-        if (this === other) return true
-        if (other === null || other::class != this::class) return false
-
-        return true
-    }
-}
-
-fun test(f: Foo?): KClass<out Foo>? = if (f != null) f::class else null
-
-fun test2(): KClass<out Foo>? {
-    var f: Foo? = null
-    if (f != null) {
-        run { f = null }
-        return <!RETURN_TYPE_MISMATCH!><!EXPRESSION_OF_NULLABLE_TYPE_IN_CLASS_LITERAL_LHS!>f<!>::class<!>
-    }
-    return null
-}

compiler/testData/diagnostics/tests/classLiteral/smartCast.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // KT-16291 Smart cast doesn't work when getting class of instance
 
 import kotlin.reflect.KClass