Add application settings to support inactive project deletion feature

What does this MR do and why?

Describe in detail what your merge request does and why.

Add application settings to support inactive project deletion feature.


Migration up

== 20220406113217 AddInactiveProjectDeletionToApplicationSettings: migrating ==
-- add_column(:application_settings, :delete_inactive_projects, :boolean, {:default=>false, :null=>false})
   -> 0.0070s
-- add_column(:application_settings, :inactive_projects_delete_after_months, :integer, {:default=>2, :null=>false})
   -> 0.0025s
-- add_column(:application_settings, :inactive_projects_min_size_mb, :integer, {:default=>0, :null=>false})
   -> 0.0021s
-- add_column(:application_settings, :inactive_projects_send_warning_email_after_months, :integer, {:default=>1, :null=>false})
   -> 0.0018s
== 20220406113217 AddInactiveProjectDeletionToApplicationSettings: migrated (0.0136s)

Migration down

== 20220406113217 AddInactiveProjectDeletionToApplicationSettings: reverting ==
-- remove_column(:application_settings, :inactive_projects_send_warning_email_after_months, :integer, {:default=>1, :null=>false})
   -> 0.0033s
-- remove_column(:application_settings, :inactive_projects_min_size_mb, :integer, {:default=>0, :null=>false})
   -> 0.0015s
-- remove_column(:application_settings, :inactive_projects_delete_after_months, :integer, {:default=>2, :null=>false})
   -> 0.0036s
-- remove_column(:application_settings, :delete_inactive_projects, :boolean, {:default=>false, :null=>false})
   -> 0.0074s
== 20220406113217 AddInactiveProjectDeletionToApplicationSettings: reverted (0.0180s)

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How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

  1. Run the migration bundle exec rails db:migrate
  2. Verify that the new rows in the application_settings table are added.
  3. Modify the values using the application settings API. Example {{baseURL}}/api/v4/application/settings?inactive_projects_delete_after=3&inactive_projects_min_size_mb=5&inactive_projects_send_warning_email_after=1
  4. Check the documentation changes - http://gdk.test:3005/ee/api/settings.html

MR acceptance checklist

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Relates to

Edited by Huzaifa Iftikhar

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