refactor(backend): change naming of function names to avoid the is_ prefix

Following Credo.Check.Readability.PredicateFunctionNames check

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/service/workers/legacy_notifier_builder.ex

@@ -81,7 +81,7 @@ defmodule Mobilizon.Service.Workers.LegacyNotifierBuilder do
          options
        ) do
     mentionned_actor_ids
-    |> Enum.filter(&Actors.is_member?(&1, Keyword.fetch!(options, :group_id)))
+    |> Enum.filter(&Actors.member?(&1, Keyword.fetch!(options, :group_id)))
     |> users_from_actor_ids(Keyword.fetch!(options, :author_id))
   end
 

lib/service/workers/send_activity_recap_worker.ex

@@ -16,7 +16,7 @@ defmodule Mobilizon.Service.Workers.SendActivityRecapWorker do
     only: [
       is_between_hours?: 1,
       is_between_hours_on_first_day?: 1,
-      is_delay_ok_since_last_notification_sent?: 1
+      delay_ok_since_last_notification_sent?: 1
     ]
 
   @impl Oban.Worker
@@ -108,7 +108,7 @@ defmodule Mobilizon.Service.Workers.SendActivityRecapWorker do
       "Testing if it's less than an hour since the last time we sent an activity recap"
     )
 
-    is_delay_ok_since_last_notification_sent?(last_notification_sent)
+    delay_ok_since_last_notification_sent?(last_notification_sent)
   end
 
   # If we're between notification hours