FIR: add support for varargs in annotation calls

compiler/testData/ir/irText/declarations/annotations/annotationsWithVarargParameters.fir.txt

@@ -28,12 +28,14 @@ FILE fqName:<root> fileName:/annotationsWithVarargParameters.kt
         public open fun toString (): kotlin.String declared in kotlin.Any
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
   FUN name:test1 visibility:public modality:FINAL <> () returnType:kotlin.Unit
+    annotations:
+      A(xs = ['abc', 'def'])
     BLOCK_BODY
   FUN name:test2 visibility:public modality:FINAL <> () returnType:kotlin.Unit
     annotations:
-      A(xs = 'abc')
+      A(xs = ['abc'])
     BLOCK_BODY
   FUN name:test3 visibility:public modality:FINAL <> () returnType:kotlin.Unit
     annotations:
-      A(xs = <null>)
+      A(xs = [])
     BLOCK_BODY

compiler/testData/ir/irText/declarations/annotations/fileAnnotations.fir.txt

@@ -3,7 +3,7 @@ FILE fqName:test fileName:/fileAnnotations.kt
     A(x = 'File annotation')
   CLASS ANNOTATION_CLASS name:A modality:FINAL visibility:public superTypes:[kotlin.Annotation]
     annotations:
-      Target(allowedTargets = GET_ENUM 'ENUM_ENTRY IR_EXTERNAL_DECLARATION_STUB name:FILE' type=kotlin.annotation.AnnotationTarget)
+      Target(allowedTargets = [GET_ENUM 'ENUM_ENTRY IR_EXTERNAL_DECLARATION_STUB name:FILE' type=kotlin.annotation.AnnotationTarget])
     $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:test.A
     CONSTRUCTOR visibility:public <> (x:kotlin.String) returnType:test.A [primary]
       VALUE_PARAMETER name:x index:0 type:kotlin.String

compiler/testData/ir/irText/declarations/annotations/spreadOperatorInAnnotationArguments.fir.txt

@@ -28,4 +28,6 @@ FILE fqName:<root> fileName:/spreadOperatorInAnnotationArguments.kt
         public open fun toString (): kotlin.String declared in kotlin.Any
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
   FUN name:test visibility:public modality:FINAL <> () returnType:kotlin.Unit
+    annotations:
+      A(xs = [SPREAD_ELEMENT, SPREAD_ELEMENT])
     BLOCK_BODY

compiler/testData/ir/irText/declarations/annotations/typeAliasesWithAnnotations.fir.txt

@@ -2,7 +2,7 @@ FILE fqName:<root> fileName:/typeAliasesWithAnnotations.kt
   TYPEALIAS name:TestTypeAlias visibility:public expandedType:kotlin.String
   CLASS ANNOTATION_CLASS name:TestAnn modality:FINAL visibility:public superTypes:[kotlin.Annotation]
     annotations:
-      Target(allowedTargets = GET_ENUM 'ENUM_ENTRY IR_EXTERNAL_DECLARATION_STUB name:TYPEALIAS' type=kotlin.annotation.AnnotationTarget)
+      Target(allowedTargets = [GET_ENUM 'ENUM_ENTRY IR_EXTERNAL_DECLARATION_STUB name:TYPEALIAS' type=kotlin.annotation.AnnotationTarget])
     $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:<root>.TestAnn
     CONSTRUCTOR visibility:public <> (x:kotlin.String) returnType:<root>.TestAnn [primary]
       VALUE_PARAMETER name:x index:0 type:kotlin.String

compiler/testData/ir/irText/declarations/annotations/typeParametersWithAnnotations.fir.txt

@@ -1,7 +1,7 @@
 FILE fqName:<root> fileName:/typeParametersWithAnnotations.kt
   CLASS ANNOTATION_CLASS name:Anno modality:FINAL visibility:public superTypes:[kotlin.Annotation]
     annotations:
-      Target(allowedTargets = GET_ENUM 'ENUM_ENTRY IR_EXTERNAL_DECLARATION_STUB name:TYPE_PARAMETER' type=kotlin.annotation.AnnotationTarget)
+      Target(allowedTargets = [GET_ENUM 'ENUM_ENTRY IR_EXTERNAL_DECLARATION_STUB name:TYPE_PARAMETER' type=kotlin.annotation.AnnotationTarget])
     $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:<root>.Anno
     CONSTRUCTOR visibility:public <> () returnType:<root>.Anno [primary]
     FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean [fake_override,operator]

compiler/testData/ir/irText/declarations/annotations/varargsInAnnotationArguments.fir.txt

@@ -84,10 +84,14 @@ FILE fqName:<root> fileName:/varargsInAnnotationArguments.kt
         public open fun toString (): kotlin.String declared in kotlin.Any
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
   FUN name:test1 visibility:public modality:FINAL <> () returnType:kotlin.Unit
+    annotations:
+      A1(xs = ['1', '2', '3'])
+      A2(xs = ['a', 'b', 'c'])
+      AA(xs = [A1(xs = ['4']), A1(xs = ['5']), A1(xs = ['6'])])
     BLOCK_BODY
   FUN name:test2 visibility:public modality:FINAL <> () returnType:kotlin.Unit
     annotations:
-      A1(xs = <null>)
-      A2(xs = <null>)
-      AA(xs = <null>)
+      A1(xs = [])
+      A2(xs = [])
+      AA(xs = [])
     BLOCK_BODY