Type phase healing doesn't work on type members

[fhackett]

import scala.quoted._
sealed trait Trait[T] {
  type t = T
}

object O {
  def fn[T:Type](t : Trait[T])(using QuoteContext): Type[T] = '[t.t]
}

This fails to compile with a phase incorrectness error:

xxx |  def fn[T:Type](t : Trait[T]) : Type[T] = '[t.t]
    |                                             ^
    |                           access to value t from wrong staging level:
    |                            - the definition is at level 0,
    |                            - but the access is at level 1.

which can be worked around with the following change, despite in both cases there being a Type[T] or Type[t.t] implicitly available:

sealed trait Trait[T] {
  type t = T
}

object O {
  def fn[T:Type](t : Trait[T]) : Type[T] = {
    type TT = t.t
    '[TT]
  }
}

This isn't a huge issue since the workaround is quite simple, but it does seem like a strange thing to not work.