Add all annotations to forwarder

Author: nicolasstucki

compiler/src/dotty/tools/dotc/typer/Namer.scala

@@ -1129,9 +1129,7 @@ class Namer { typer: Typer =>
                 ctx.newSymbol(cls, forwarderName, mbrFlags, mbrInfo, coord = span)
               }
             forwarder.info = avoidPrivateLeaks(forwarder)
-            for annot <- sym.annotations do
-              if annot.tree.symbol.maybeOwner == defn.AlphaAnnot then
-                forwarder.addAnnotation(annot)
+            forwarder.addAnnotations(sym.annotations)
             val forwarderDef =
               if (forwarder.isType) tpd.TypeDef(forwarder.asType)
               else {