[FIR] Report UPPER_BOUND_VIOLATED only on checkers stage, fix detection of missing cases and testData

compiler/testData/diagnostics/tests/recovery/namelessMembers.kt

@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// FIR_IDE_IGNORE
 // !DIAGNOSTICS: -REDECLARATION -DUPLICATE_CLASS_NAMES
 
 class C {

compiler/testData/diagnostics/tests/recovery/namelessToplevelDeclarations.fir.kt

@@ -21,6 +21,6 @@ object<!SYNTAX!><!> {
 
 }
 
-<!UPPER_BOUND_VIOLATED!>enum class<!SYNTAX!><!> {}<!>
+enum class<!SYNTAX!><!> {}
 
 annotation class<!SYNTAX!><!> {}