[FIR] move file annotations to the FirFileAnnotationsContainer

compiler/fir/tree/tree-generator/src/org/jetbrains/kotlin/fir/tree/generator/ImplementationConfigurator.kt

@@ -552,7 +552,10 @@ object ImplementationConfigurator : AbstractFirTreeImplementationConfigurator()
         noImpl(userTypeRef)
 
         impl(file) {
-            default("symbol", "FirFileSymbol()")
+            default("annotations") {
+                value = "annotationsContainer.annotations"
+                withGetter = true
+            }
         }
 
         noImpl(argumentList)

compiler/fir/tree/tree-generator/src/org/jetbrains/kotlin/fir/tree/generator/NodeConfigurator.kt

@@ -452,6 +452,7 @@ object NodeConfigurator : AbstractFieldConfigurator<FirTreeBuilder>(FirTreeBuild
         }
 
         file.configure {
+            +field("annotationsContainer", fileAnnotationsContainer).withTransform()
             +field("packageDirective", packageDirective)
             +fieldList(import).withTransform()
             +declarations.withTransform()