Fix #10355: Run PostTyper before Staging

PostTyper marks compilation units with `needsStaging` to enable this phase.

Author: nicolasstucki

compiler/src/dotty/tools/repl/ReplCompiler.scala

@@ -34,8 +34,8 @@ class ReplCompiler extends Compiler {
   override protected def frontendPhases: List[List[Phase]] = List(
     List(new REPLFrontEnd),
     List(new CollectTopLevelImports),
+    List(new PostTyper),
     List(new Staging),
-    List(new PostTyper)
   )
 
   def newRun(initCtx: Context, state: State): Run = new Run(this, initCtx) {

compiler/test-resources/repl/i10355

@@ -0,0 +1,5 @@
+scala> import scala.quoted._
+scala> def foo(expr: Expr[Any])(using Quotes) = expr match { case '{ $x: t } => '{ $x: Any } }
+def foo(expr: quoted.Expr[Any])(using x$2: quoted.Quotes): quoted.Expr[Any]
+scala> def bar(expr: Expr[Any])(using Quotes) = expr match { case '{ $x: t } => '{ val a: t = ??? ; ???} }
+def bar(expr: quoted.Expr[Any])(using x$2: quoted.Quotes): quoted.Expr[Nothing]