K2: don't report REDECLARATION on Enum.entries

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/FirDeclarationInspector.kt

@@ -233,6 +233,7 @@ private val NO_NAME_PROVIDED = Name.special("<no name provided>")
 // you can't redeclare something that has no name.
 private fun FirDeclaration.isCollectable() = when (this) {
     is FirSimpleFunction -> source?.kind !is KtFakeSourceElementKind && name != NO_NAME_PROVIDED
+    is FirProperty -> source?.kind !is KtFakeSourceElementKind.EnumGeneratedDeclaration
     is FirRegularClass -> name != NO_NAME_PROVIDED
     else -> true
 }