Overload the * operator for Logged

[etianen]

This can be used to create repetitions of log patterns.

• Use this in the why test logging example like this:

  from logot import Logot, logged
  
  def test_poll_daemon(logot: Logot) -> None:
      app.start_poll()
      logot.wait_for(
          (logged.info("Poll started")) >> logged.info("Poll finished")) * 3
      )

• Link to the log pattern matching docs from this example.

• Implement with _from_compose to correctly flatten _OrderedAllLogged.

[etianen]

This is actually a bad idea. Should multiplying a log pattern join them with >> or &? It's unclear.

[etianen]

Increasingly I think this is useful, and should join log patterns with the >> operator.