Health check fails on alarm report

[elinol]

Health reports are failing because :alarm_handler.get_alarms() can return a single tuple instead of a list which is expected in the alarm report:

 @impl Report
  def alarms do
    for {id, description} <- :alarm_handler.get_alarms(), into: %{} do
      try do
        {inspect(id), inspect(description)}
      catch
        _, _ ->
          {"bad alarm term", ""}
      end
    end
  end

This prevents the health report from proceeding with the other reports like metrics and connectivity.

On a test device:

iex(39)> NervesHubLink.Extensions.Health.DefaultReport.alarms
** (Protocol.UndefinedError) protocol Enumerable not implemented for {:error, :bad_module} of type Tuple. This protocol is implemented for the following type(s): CircularBuffer, Date.Range, File.Stream, Function, GenEvent.Stream, HashDict, HashSet, IO.Stream, Jason.OrderedObject, List, Map, MapSet, Range, Stream
    (elixir 1.17.2) lib/enum.ex:1: Enumerable.impl_for!/1
    (elixir 1.17.2) lib/enum.ex:166: Enumerable.reduce/3
    (elixir 1.17.2) lib/enum.ex:4423: Enum.reduce/3
    (nerves_hub_link 2.5.2) lib/nerves_hub_link/extensions/health/default_report.ex:25: NervesHubLink.Extensions.Health.DefaultReport.alarms/0
    iex:39: (file)
iex(39)> :alarm_handler.get_alarms()
{:error, :bad_module}