FIR: Properly deserialize upper bounds of classes type parameters

^KT-46661 Fixed

idea/testData/checker/recovery/namelessMembers.fir.kt

@@ -7,7 +7,7 @@ class C {
 
     class<error descr="Name expected"> </error>{}
 
-    enum class<error descr="Name expected"> </error>{}
+    <error descr="[UPPER_BOUND_VIOLATED] Type argument is not within its bounds: should be subtype of 'kotlin/Enum<C.<no name provided>>'">enum class<error descr="Name expected"> </error>{}</error>
 }
 
 class C1<<error descr="Type parameter name expected">in</error>> {}

idea/testData/checker/recovery/namelessToplevelDeclarations.fir.kt

@@ -19,6 +19,6 @@ object<error descr="Name expected"> </error>{
 
 }
 
-enum class<error descr="Name expected"> </error>{}
+<error descr="[UPPER_BOUND_VIOLATED] Type argument is not within its bounds: should be subtype of 'kotlin/Enum<<no name provided>>'">enum class<error descr="Name expected"> </error>{}</error>
 
 annotation class<error descr="Name expected"> </error>{}