Rename privilege tags

I first focussed on getting things working
Now that they do and we know what tags there are, I put some thought in providing better names

I use the form <what_it_controls>_<what_it_allows_you_to_do>

:statuses_read    => :messages_read
:status_delete    => :messages_delete

:user_read        => :users_read
:user_deletion    => :users_delete
:user_activation  => :users_manage_activation_state
:user_invite      => :users_manage_invites
:user_tag         => :users_manage_tags
:user_credentials => :users_manage_credentials

:report_handle    => :reports_manage_reports

:emoji_management => :emoji_manage_emoji

test/pleroma/web/mastodon_api/controllers/notification_controller_test.exs

@@ -74,7 +74,7 @@ defmodule Pleroma.Web.MastodonAPI.NotificationControllerTest do
   end
 
   test "by default, does not contain pleroma:report" do
-    clear_config([:instance, :moderator_privileges], [:report_handle])
+    clear_config([:instance, :moderator_privileges], [:reports_manage_reports])
 
     user = insert(:user)
     other_user = insert(:user)
@@ -105,7 +105,7 @@ defmodule Pleroma.Web.MastodonAPI.NotificationControllerTest do
   end
 
   test "Pleroma:report is hidden for non-privileged users" do
-    clear_config([:instance, :moderator_privileges], [:report_handle])
+    clear_config([:instance, :moderator_privileges], [:reports_manage_reports])
 
     user = insert(:user)
     other_user = insert(:user)

test/pleroma/web/mastodon_api/controllers/status_controller_test.exs

@@ -969,7 +969,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusControllerTest do
     end
 
     test "when you're privileged to", %{conn: conn} do
-      clear_config([:instance, :moderator_privileges], [:status_delete])
+      clear_config([:instance, :moderator_privileges], [:messages_delete])
       activity = insert(:note_activity)
       moderator = insert(:user, is_moderator: true)
 

test/pleroma/web/mastodon_api/views/account_view_test.exs

@@ -358,7 +358,7 @@ defmodule Pleroma.Web.MastodonAPI.AccountViewTest do
   end
 
   test "Represent a deactivated user for a privileged user" do
-    clear_config([:instance, :moderator_privileges], [:user_activation])
+    clear_config([:instance, :moderator_privileges], [:users_manage_activation_state])
 
     admin = insert(:user, is_moderator: true)
     deactivated_user = insert(:user, is_active: false)

test/pleroma/web/mastodon_api/views/notification_view_test.exs

@@ -218,7 +218,7 @@ defmodule Pleroma.Web.MastodonAPI.NotificationViewTest do
   end
 
   test "Report notification" do
-    clear_config([:instance, :moderator_privileges], [:report_handle])
+    clear_config([:instance, :moderator_privileges], [:reports_manage_reports])
 
     reporting_user = insert(:user)
     reported_user = insert(:user)