FIR checker: apply override checker to anonymous objects

^KT-44695 Fixed

compiler/fir/entrypoint/src/org/jetbrains/kotlin/fir/checkers/CommonDeclarationCheckers.kt

@@ -37,6 +37,7 @@ object CommonDeclarationCheckers : DeclarationCheckers() {
     )
 
     override val classCheckers: Set<FirClassChecker> = setOf(
+        FirOverrideChecker,
         FirThrowableSubclassChecker,
     )
 
@@ -51,7 +52,6 @@ object CommonDeclarationCheckers : DeclarationCheckers() {
         FirLocalEntityNotAllowedChecker,
         FirManyCompanionObjectsChecker,
         FirMethodOfAnyImplementedInInterfaceChecker,
-        FirOverrideChecker,
         FirPrimaryConstructorRequiredForDataClassChecker,
         FirSupertypeInitializedInInterfaceChecker,
         FirSupertypeInitializedWithoutPrimaryConstructor,