Address ApiClient Bullet warnings & refactor

- Resolves the following N+1 Bullet warning that was being triggered by both of these updated controllers:
```
USE eager loading detected
  ApiClient => [:org]
  Add to your query: .includes([:org])
Call stack
  /home/aaron/Documents/GitHub/roadmap/app/views/paginable/api_clients/_index.html.erb:27:in `block in _app_views_paginable_api_clients__index_html_erb___600648306456484266_76960'
  /home/aaron/Documents/GitHub/roadmap/app/views/paginable/api_clients/_index.html.erb:24:in `_app_views_paginable_api_clients__index_html_erb___600648306456484266_76960'
  /home/aaron/Documents/GitHub/roadmap/app/controllers/concerns/paginable.rb:85:in `paginable_renderise'
  /home/aaron/Documents/GitHub/roadmap/app/views/super_admin/api_clients/index.html.erb:16:in `_app_views_super_admin_api_clients_index_html_erb__3604505130684601528_76940'
```
- Additionally, `ApiClient.includes(:org).all.page(1)` appears to be redundant, so it has been refactored to `ApiClient.includes(:org).page(1)`.

app/controllers/paginable/api_clients_controller.rb

@@ -10,7 +10,7 @@ class ApiClientsController < ApplicationController
     # GET /paginable/api_clients
     def index
       authorize(ApiClient)
-      @api_clients = ApiClient.all
+      @api_clients = ApiClient.includes(:org).all
 
       paginable_renderise(
         partial: 'index',

app/controllers/super_admin/api_clients_controller.rb

@@ -12,7 +12,7 @@ class ApiClientsController < ApplicationController
     # GET /api_clients
     def index
       authorize(ApiClient)
-      @api_clients = ApiClient.all.page(1)
+      @api_clients = ApiClient.includes(:org).page(1)
     end
 
     # GET /api_clients/new