[FIR2IR] Properly setup IrClass.sealedSubclasses

compiler/testData/codegen/box/smartCasts/kt44814.fir.txt

@@ -19,6 +19,9 @@ FILE fqName:<root> fileName:/kt44814.kt
         public open fun toString (): kotlin.String declared in kotlin.Any
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
   CLASS CLASS name:FirSourceElement modality:SEALED visibility:public superTypes:[kotlin.Any]
+    sealedSubclasses:
+      CLASS CLASS name:FirPsiSourceElement modality:FINAL visibility:public superTypes:[<root>.FirSourceElement]
+      CLASS CLASS name:FirLightSourceElement modality:FINAL visibility:public superTypes:[<root>.FirSourceElement]
     $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:<root>.FirSourceElement
     CONSTRUCTOR visibility:protected <> () returnType:<root>.FirSourceElement [primary]
       BLOCK_BODY
@@ -368,6 +371,9 @@ FILE fqName:<root> fileName:/kt44814.kt
         public open fun toString (): kotlin.String [fake_override] declared in <root>.PsiElement
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
   CLASS CLASS name:FirModifier modality:SEALED visibility:internal superTypes:[kotlin.Any]
+    sealedSubclasses:
+      CLASS CLASS name:FirPsiModifier modality:FINAL visibility:public superTypes:[<root>.FirModifier<<root>.ASTNode>]
+      CLASS CLASS name:FirLightModifier modality:FINAL visibility:public superTypes:[<root>.FirModifier<<root>.LighterASTNode>]
     $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:<root>.FirModifier<Node of <root>.FirModifier>
     TYPE_PARAMETER name:Node index:0 variance: superTypes:[kotlin.Any]
     CONSTRUCTOR visibility:protected <> (node:Node of <root>.FirModifier, token:<root>.KtModifierKeywordToken) returnType:<root>.FirModifier<Node of <root>.FirModifier> [primary]
@@ -504,6 +510,9 @@ FILE fqName:<root> fileName:/kt44814.kt
         public open fun toString (): kotlin.String declared in kotlin.Any
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
   CLASS CLASS name:FirModifierList modality:SEALED visibility:internal superTypes:[kotlin.Any]
+    sealedSubclasses:
+      CLASS CLASS name:FirPsiModifierList modality:FINAL visibility:public superTypes:[<root>.FirModifierList]
+      CLASS CLASS name:FirLightModifierList modality:FINAL visibility:public superTypes:[<root>.FirModifierList]
     $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:<root>.FirModifierList
     CONSTRUCTOR visibility:protected <> () returnType:<root>.FirModifierList [primary]
       BLOCK_BODY

compiler/testData/ir/irText/firProblems/ArrayMap.fir.txt

@@ -1,5 +1,9 @@
 FILE fqName:<root> fileName:/ArrayMap.kt
   CLASS CLASS name:ArrayMap modality:SEALED visibility:public superTypes:[kotlin.collections.Iterable<T of <root>.ArrayMap>]
+    sealedSubclasses:
+      CLASS OBJECT name:EmptyArrayMap modality:FINAL visibility:internal superTypes:[<root>.ArrayMap<kotlin.Nothing>]
+      CLASS CLASS name:OneElementArrayMap modality:FINAL visibility:internal superTypes:[<root>.ArrayMap<T of <root>.OneElementArrayMap>]
+      CLASS CLASS name:ArrayMapImpl modality:FINAL visibility:internal superTypes:[<root>.ArrayMap<T of <root>.ArrayMapImpl>]
     $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:<root>.ArrayMap<T of <root>.ArrayMap>
     TYPE_PARAMETER name:T index:0 variance: superTypes:[kotlin.Any]
     CONSTRUCTOR visibility:protected <> () returnType:<root>.ArrayMap<T of <root>.ArrayMap> [primary]

compiler/testData/ir/irText/regressions/kt45236.fir.txt

@@ -1,5 +1,7 @@
 FILE fqName:<root> fileName:/kt45236.kt
   CLASS CLASS name:NetRequestStatus modality:SEALED visibility:public superTypes:[kotlin.Any]
+    sealedSubclasses:
+      CLASS CLASS name:Error modality:FINAL visibility:public [data] superTypes:[<root>.NetRequestStatus<T of <root>.NetRequestStatus.Error>]
     $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:<root>.NetRequestStatus<T of <root>.NetRequestStatus>
     TYPE_PARAMETER name:T index:0 variance:out superTypes:[kotlin.Any]
     CONSTRUCTOR visibility:protected <> () returnType:<root>.NetRequestStatus<T of <root>.NetRequestStatus> [primary]