Drop otp log events if handle_otp_reports is set to false

[martosaur]

Currently handle_otp_reports logger option doesn't seem to have any effect. It's passed as otp option to Logger.Utils.translator/2 (which is always attached as a primary logger filter) and the only clause that uses this option seemingly can never match. Here's an example:

:logger.remove_primary_filter(:logger_translator)

:logger.add_primary_filter(
  :logger_translator,
  {&Logger.Utils.translator/2, %{otp: false, sasl: false, translators: [{Logger.Translator, :translate}]}}
)

Task.start(fn -> exit("Exit") end)

Process.sleep(1_000)

12:25:45.123 [error] Task #PID<0.97.0> started from #PID<0.94.0> terminating
** (stop) "Exit"
    logger.exs:8: anonymous fn/0 in :elixir_compiler_0.__FILE__/1
    (elixir 1.18.3) lib/task/supervised.ex:101: Task.Supervised.invoke_mfa/2
Function: #Function<0.18661568 in file:logger.exs>
    Args: []

The error is both logged and translated.

This PR changes the clause to drop all events with :otp domain if handle_otp_reports is set to false.

[josevalim]

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